diff --git a/go.mod b/go.mod
index 1f647468b..bc343644c 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.18
 require (
 	github.com/algolia/algoliasearch-client-go/v3 v3.26.4
 	github.com/apparentlymart/go-textseg v1.0.0
-	github.com/creachadair/jrpc2 v0.45.0
+	github.com/creachadair/jrpc2 v0.46.0
 	github.com/google/go-cmp v0.5.9
 	github.com/hashicorp/go-cleanhttp v0.5.2
 	github.com/hashicorp/go-memdb v1.3.4
diff --git a/go.sum b/go.sum
index c5dcc23c8..783291dc8 100644
--- a/go.sum
+++ b/go.sum
@@ -79,8 +79,8 @@ github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnht
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
 github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
-github.com/creachadair/jrpc2 v0.45.0 h1:61Cdy1IbyB3So5+znIQ4eki4P1/j/FiNIy0SS9j3kJY=
-github.com/creachadair/jrpc2 v0.45.0/go.mod h1:O7R/rmcUivGXUkfmbuWevcLv6f1xbKVSoMvmhW4/fr8=
+github.com/creachadair/jrpc2 v0.46.0 h1:ahMNQN8Q6oJDC6Zn/TPK1YRAP5alFQ5hk2h5tzBVifE=
+github.com/creachadair/jrpc2 v0.46.0/go.mod h1:O7R/rmcUivGXUkfmbuWevcLv6f1xbKVSoMvmhW4/fr8=
 github.com/creachadair/mds v0.0.0-20230313153906-9788b6f60568 h1:LzMDPh2FLXEHnQNTjGJT+vInPSDVOUTuzqE4GskHTNg=
 github.com/creachadair/mds v0.0.0-20230313153906-9788b6f60568/go.mod h1:caBACU+n1Q/rZ252FTzfnG0/H+ZUi+UnIQtEOraMv/g=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
diff --git a/internal/langserver/handlers/command/init.go b/internal/langserver/handlers/command/init.go
index 2109965ce..f6d6d120f 100644
--- a/internal/langserver/handlers/command/init.go
+++ b/internal/langserver/handlers/command/init.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/document"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
 	"github.com/hashicorp/terraform-ls/internal/langserver/errors"
@@ -17,7 +17,7 @@ import (
 func (h *CmdHandler) TerraformInitHandler(ctx context.Context, args cmd.CommandArgs) (interface{}, error) {
 	dirUri, ok := args.GetString("uri")
 	if !ok || dirUri == "" {
-		return nil, fmt.Errorf("%w: expected module uri argument to be set", code.InvalidParams.Err())
+		return nil, fmt.Errorf("%w: expected module uri argument to be set", jrpc2.InvalidParams.Err())
 	}
 
 	if !uri.IsURIValid(dirUri) {
diff --git a/internal/langserver/handlers/command/module_callers.go b/internal/langserver/handlers/command/module_callers.go
index fbb4eb514..0f0e37afc 100644
--- a/internal/langserver/handlers/command/module_callers.go
+++ b/internal/langserver/handlers/command/module_callers.go
@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"sort"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
 	"github.com/hashicorp/terraform-ls/internal/uri"
 )
@@ -24,7 +24,7 @@ type moduleCaller struct {
 func (h *CmdHandler) ModuleCallersHandler(ctx context.Context, args cmd.CommandArgs) (interface{}, error) {
 	modUri, ok := args.GetString("uri")
 	if !ok || modUri == "" {
-		return nil, fmt.Errorf("%w: expected module uri argument to be set", code.InvalidParams.Err())
+		return nil, fmt.Errorf("%w: expected module uri argument to be set", jrpc2.InvalidParams.Err())
 	}
 
 	if !uri.IsURIValid(modUri) {
diff --git a/internal/langserver/handlers/command/module_calls.go b/internal/langserver/handlers/command/module_calls.go
index bc47132e9..3cf18b176 100644
--- a/internal/langserver/handlers/command/module_calls.go
+++ b/internal/langserver/handlers/command/module_calls.go
@@ -6,7 +6,7 @@ import (
 	"sort"
 	"strings"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
 	"github.com/hashicorp/terraform-ls/internal/uri"
 	tfaddr "github.com/hashicorp/terraform-registry-address"
@@ -48,7 +48,7 @@ func (h *CmdHandler) ModuleCallsHandler(ctx context.Context, args cmd.CommandArg
 
 	modUri, ok := args.GetString("uri")
 	if !ok || modUri == "" {
-		return response, fmt.Errorf("%w: expected module uri argument to be set", code.InvalidParams.Err())
+		return response, fmt.Errorf("%w: expected module uri argument to be set", jrpc2.InvalidParams.Err())
 	}
 
 	if !uri.IsURIValid(modUri) {
diff --git a/internal/langserver/handlers/command/module_providers.go b/internal/langserver/handlers/command/module_providers.go
index 104740e2e..c35013c2e 100644
--- a/internal/langserver/handlers/command/module_providers.go
+++ b/internal/langserver/handlers/command/module_providers.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
 	"github.com/hashicorp/terraform-ls/internal/uri"
 	tfaddr "github.com/hashicorp/terraform-registry-address"
@@ -33,7 +33,7 @@ func (h *CmdHandler) ModuleProvidersHandler(ctx context.Context, args cmd.Comman
 
 	modUri, ok := args.GetString("uri")
 	if !ok || modUri == "" {
-		return response, fmt.Errorf("%w: expected module uri argument to be set", code.InvalidParams.Err())
+		return response, fmt.Errorf("%w: expected module uri argument to be set", jrpc2.InvalidParams.Err())
 	}
 
 	if !uri.IsURIValid(modUri) {
diff --git a/internal/langserver/handlers/command/terraform.go b/internal/langserver/handlers/command/terraform.go
index 95ccd17ca..698090eed 100644
--- a/internal/langserver/handlers/command/terraform.go
+++ b/internal/langserver/handlers/command/terraform.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
 	"github.com/hashicorp/terraform-ls/internal/langserver/progress"
 	"github.com/hashicorp/terraform-ls/internal/uri"
@@ -31,7 +31,7 @@ func (h *CmdHandler) TerraformVersionRequestHandler(ctx context.Context, args cm
 	progress.Report(ctx, "Finding current module info ...")
 	modUri, ok := args.GetString("uri")
 	if !ok || modUri == "" {
-		return response, fmt.Errorf("%w: expected module uri argument to be set", code.InvalidParams.Err())
+		return response, fmt.Errorf("%w: expected module uri argument to be set", jrpc2.InvalidParams.Err())
 	}
 
 	if !uri.IsURIValid(modUri) {
diff --git a/internal/langserver/handlers/command/validate.go b/internal/langserver/handlers/command/validate.go
index e27afadce..f2631d94b 100644
--- a/internal/langserver/handlers/command/validate.go
+++ b/internal/langserver/handlers/command/validate.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	lsctx "github.com/hashicorp/terraform-ls/internal/context"
 	"github.com/hashicorp/terraform-ls/internal/document"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
@@ -19,7 +19,7 @@ import (
 func (h *CmdHandler) TerraformValidateHandler(ctx context.Context, args cmd.CommandArgs) (interface{}, error) {
 	dirUri, ok := args.GetString("uri")
 	if !ok || dirUri == "" {
-		return nil, fmt.Errorf("%w: expected module uri argument to be set", code.InvalidParams.Err())
+		return nil, fmt.Errorf("%w: expected module uri argument to be set", jrpc2.InvalidParams.Err())
 	}
 
 	if !uri.IsURIValid(dirUri) {
diff --git a/internal/langserver/handlers/execute_command.go b/internal/langserver/handlers/execute_command.go
index a968246de..18d2cd19b 100644
--- a/internal/langserver/handlers/execute_command.go
+++ b/internal/langserver/handlers/execute_command.go
@@ -5,7 +5,6 @@ import (
 	"fmt"
 
 	"github.com/creachadair/jrpc2"
-	"github.com/creachadair/jrpc2/code"
 	lsctx "github.com/hashicorp/terraform-ls/internal/context"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
 	"github.com/hashicorp/terraform-ls/internal/langserver/handlers/command"
@@ -39,7 +38,7 @@ func (svc *service) WorkspaceExecuteCommand(ctx context.Context, params lsp.Exec
 	commandPrefix, _ := lsctx.CommandPrefix(ctx)
 	handler, ok := cmdHandlers(svc).Get(params.Command, commandPrefix)
 	if !ok {
-		return nil, fmt.Errorf("%w: command handler not found for %q", code.MethodNotFound.Err(), params.Command)
+		return nil, fmt.Errorf("%w: command handler not found for %q", jrpc2.MethodNotFound.Err(), params.Command)
 	}
 
 	pt, ok := params.WorkDoneToken.(lsp.ProgressToken)
@@ -52,6 +51,6 @@ func (svc *service) WorkspaceExecuteCommand(ctx context.Context, params lsp.Exec
 
 func removedHandler(errorMessage string) cmd.Handler {
 	return func(context.Context, cmd.CommandArgs) (interface{}, error) {
-		return nil, jrpc2.Errorf(code.MethodNotFound, "REMOVED: %s", errorMessage)
+		return nil, jrpc2.Errorf(jrpc2.MethodNotFound, "REMOVED: %s", errorMessage)
 	}
 }
diff --git a/internal/langserver/handlers/execute_command_init_test.go b/internal/langserver/handlers/execute_command_init_test.go
index 74500c7cb..014354c9c 100644
--- a/internal/langserver/handlers/execute_command_init_test.go
+++ b/internal/langserver/handlers/execute_command_init_test.go
@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/go-version"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
@@ -66,7 +66,7 @@ func TestLangServer_workspaceExecuteCommand_init_argumentError(t *testing.T) {
 		Method: "workspace/executeCommand",
 		ReqParams: fmt.Sprintf(`{
 		"command": %q
-	}`, cmd.Name("terraform.init"))}, code.InvalidParams.Err())
+	}`, cmd.Name("terraform.init"))}, jrpc2.InvalidParams.Err())
 }
 
 func TestLangServer_workspaceExecuteCommand_init_basic(t *testing.T) {
@@ -242,5 +242,5 @@ func TestLangServer_workspaceExecuteCommand_init_error(t *testing.T) {
 		ReqParams: fmt.Sprintf(`{
 		"command": %q,
 		"arguments": ["uri=%s"]
-	}`, cmd.Name("terraform.init"), testFileURI)}, code.SystemError.Err())
+	}`, cmd.Name("terraform.init"), testFileURI)}, jrpc2.SystemError.Err())
 }
diff --git a/internal/langserver/handlers/execute_command_module_callers_test.go b/internal/langserver/handlers/execute_command_module_callers_test.go
index 07fef7c6c..6a7ef72bb 100644
--- a/internal/langserver/handlers/execute_command_module_callers_test.go
+++ b/internal/langserver/handlers/execute_command_module_callers_test.go
@@ -6,7 +6,7 @@ import (
 	"path/filepath"
 	"testing"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/document"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
@@ -67,7 +67,7 @@ func TestLangServer_workspaceExecuteCommand_moduleCallers_argumentError(t *testi
 		Method: "workspace/executeCommand",
 		ReqParams: fmt.Sprintf(`{
 		"command": %q
-	}`, cmd.Name("module.callers"))}, code.InvalidParams.Err())
+	}`, cmd.Name("module.callers"))}, jrpc2.InvalidParams.Err())
 }
 
 func TestLangServer_workspaceExecuteCommand_moduleCallers_basic(t *testing.T) {
diff --git a/internal/langserver/handlers/execute_command_module_providers_test.go b/internal/langserver/handlers/execute_command_module_providers_test.go
index 2012b5fd9..b29b921d7 100644
--- a/internal/langserver/handlers/execute_command_module_providers_test.go
+++ b/internal/langserver/handlers/execute_command_module_providers_test.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/go-version"
 	"github.com/hashicorp/terraform-ls/internal/document"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
@@ -67,7 +67,7 @@ func TestLangServer_workspaceExecuteCommand_moduleProviders_argumentError(t *tes
 		Method: "workspace/executeCommand",
 		ReqParams: fmt.Sprintf(`{
 		"command": %q
-	}`, cmd.Name("module.providers"))}, code.InvalidParams.Err())
+	}`, cmd.Name("module.providers"))}, jrpc2.InvalidParams.Err())
 }
 
 func TestLangServer_workspaceExecuteCommand_moduleProviders_basic(t *testing.T) {
diff --git a/internal/langserver/handlers/execute_command_modules_test.go b/internal/langserver/handlers/execute_command_modules_test.go
index 70c997a9a..56a67da4b 100644
--- a/internal/langserver/handlers/execute_command_modules_test.go
+++ b/internal/langserver/handlers/execute_command_modules_test.go
@@ -5,7 +5,6 @@ import (
 	"testing"
 
 	"github.com/creachadair/jrpc2"
-	"github.com/creachadair/jrpc2/code"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
 	"github.com/hashicorp/terraform-ls/internal/state"
@@ -66,5 +65,5 @@ func TestLangServer_workspaceExecuteCommand_modules_basic(t *testing.T) {
 		ReqParams: fmt.Sprintf(`{
 		"command": %q,
 		"arguments": ["uri=%s"] 
-	}`, cmd.Name("rootmodules"), testFileURI)}, jrpc2.Errorf(code.MethodNotFound, "REMOVED: use module.callers instead"))
+	}`, cmd.Name("rootmodules"), testFileURI)}, jrpc2.Errorf(jrpc2.MethodNotFound, "REMOVED: use module.callers instead"))
 }
diff --git a/internal/langserver/handlers/execute_command_test.go b/internal/langserver/handlers/execute_command_test.go
index c00c02a3f..b84d877ff 100644
--- a/internal/langserver/handlers/execute_command_test.go
+++ b/internal/langserver/handlers/execute_command_test.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
 	"github.com/hashicorp/terraform-ls/internal/state"
 	"github.com/hashicorp/terraform-ls/internal/terraform/exec"
@@ -65,5 +65,5 @@ func TestLangServer_workspaceExecuteCommand_noCommandHandlerError(t *testing.T)
 		Method: "workspace/executeCommand",
 		ReqParams: `{
 		"command": "notfound"
-	}`}, code.MethodNotFound.Err())
+	}`}, jrpc2.MethodNotFound.Err())
 }
diff --git a/internal/langserver/handlers/execute_command_validate_test.go b/internal/langserver/handlers/execute_command_validate_test.go
index 99164b145..fd65a4d63 100644
--- a/internal/langserver/handlers/execute_command_validate_test.go
+++ b/internal/langserver/handlers/execute_command_validate_test.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
 	"github.com/hashicorp/terraform-ls/internal/langserver/cmd"
 	"github.com/hashicorp/terraform-ls/internal/state"
@@ -63,5 +63,5 @@ func TestLangServer_workspaceExecuteCommand_validate_argumentError(t *testing.T)
 		Method: "workspace/executeCommand",
 		ReqParams: fmt.Sprintf(`{
 		"command": %q
-	}`, cmd.Name("terraform.validate"))}, code.InvalidParams.Err())
+	}`, cmd.Name("terraform.validate"))}, jrpc2.InvalidParams.Err())
 }
diff --git a/internal/langserver/handlers/formatting_test.go b/internal/langserver/handlers/formatting_test.go
index 6a8cf0849..4f5d88a91 100644
--- a/internal/langserver/handlers/formatting_test.go
+++ b/internal/langserver/handlers/formatting_test.go
@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/go-version"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
 	"github.com/hashicorp/terraform-ls/internal/langserver/session"
@@ -214,7 +214,7 @@ func TestLangServer_formatting_oldVersion(t *testing.T) {
 			"textDocument": {
 				"uri": "%s/main.tf"
 			}
-		}`, tmpDir.URI)}, code.SystemError.Err())
+		}`, tmpDir.URI)}, jrpc2.SystemError.Err())
 }
 
 func TestLangServer_formatting_variables(t *testing.T) {
diff --git a/internal/langserver/handlers/initialize.go b/internal/langserver/handlers/initialize.go
index 827f51313..c89a3364b 100644
--- a/internal/langserver/handlers/initialize.go
+++ b/internal/langserver/handlers/initialize.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"github.com/creachadair/jrpc2"
-	"github.com/creachadair/jrpc2/code"
 	lsctx "github.com/hashicorp/terraform-ls/internal/context"
 	"github.com/hashicorp/terraform-ls/internal/document"
 	ilsp "github.com/hashicorp/terraform-ls/internal/lsp"
@@ -134,7 +133,7 @@ func (svc *service) Initialize(ctx context.Context, params lsp.InitializeParams)
 	} else {
 		rootURI := string(params.RootURI)
 
-		invalidUriErr := jrpc2.Errorf(code.InvalidParams,
+		invalidUriErr := jrpc2.Errorf(jrpc2.InvalidParams,
 			"Unsupported or invalid URI: %q "+
 				"This is most likely client bug, please report it.", rootURI)
 
diff --git a/internal/langserver/handlers/initialize_test.go b/internal/langserver/handlers/initialize_test.go
index 2aaa91e36..d19f547a8 100644
--- a/internal/langserver/handlers/initialize_test.go
+++ b/internal/langserver/handlers/initialize_test.go
@@ -5,7 +5,7 @@ import (
 	"path/filepath"
 	"testing"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/go-version"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
 	"github.com/hashicorp/terraform-ls/internal/state"
@@ -49,7 +49,7 @@ func TestInitialize_twice(t *testing.T) {
 	    "capabilities": {},
 	    "rootUri": %q,
 	    "processId": 12345
-	}`, tmpDir.URI)}, code.SystemError.Err())
+	}`, tmpDir.URI)}, jrpc2.SystemError.Err())
 }
 
 func TestInitialize_withIncompatibleTerraformVersion(t *testing.T) {
@@ -113,7 +113,7 @@ func TestInitialize_withInvalidRootURI(t *testing.T) {
 	    "capabilities": {},
 	    "processId": 12345,
 	    "rootUri": "meh"
-	}`}, code.InvalidParams.Err())
+	}`}, jrpc2.InvalidParams.Err())
 }
 
 func TestInitialize_multipleFolders(t *testing.T) {
diff --git a/internal/langserver/handlers/semantic_tokens.go b/internal/langserver/handlers/semantic_tokens.go
index 554179d13..d3dc0490f 100644
--- a/internal/langserver/handlers/semantic_tokens.go
+++ b/internal/langserver/handlers/semantic_tokens.go
@@ -3,7 +3,7 @@ package handlers
 import (
 	"context"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	ilsp "github.com/hashicorp/terraform-ls/internal/lsp"
 	lsp "github.com/hashicorp/terraform-ls/internal/protocol"
 )
@@ -24,7 +24,7 @@ func (svc *service) TextDocumentSemanticTokensFull(ctx context.Context, params l
 		// it didn't claim to support, so we just strictly follow
 		// the protocol here and avoid serving buggy clients.
 		svc.logger.Printf("semantic tokens full request support not announced by client")
-		return tks, code.MethodNotFound.Err()
+		return tks, jrpc2.MethodNotFound.Err()
 	}
 
 	dh := ilsp.HandleFromDocumentURI(params.TextDocument.URI)
diff --git a/internal/langserver/handlers/service.go b/internal/langserver/handlers/service.go
index 8fcc3b098..5768b17a1 100644
--- a/internal/langserver/handlers/service.go
+++ b/internal/langserver/handlers/service.go
@@ -9,7 +9,6 @@ import (
 	"time"
 
 	"github.com/creachadair/jrpc2"
-	"github.com/creachadair/jrpc2/code"
 	rpch "github.com/creachadair/jrpc2/handler"
 	"github.com/hashicorp/hcl-lang/decoder"
 	"github.com/hashicorp/hcl-lang/lang"
@@ -581,7 +580,7 @@ func convertMap(m map[string]rpch.Func) rpch.Map {
 	return hm
 }
 
-const requestCancelled code.Code = -32800
+const requestCancelled jrpc2.Code = -32800
 
 // handle calls a jrpc2.Func compatible function
 func handle(ctx context.Context, req *jrpc2.Request, fn interface{}) (interface{}, error) {
diff --git a/internal/langserver/handlers/shutdown_test.go b/internal/langserver/handlers/shutdown_test.go
index 35ee02c29..8b8dd68ca 100644
--- a/internal/langserver/handlers/shutdown_test.go
+++ b/internal/langserver/handlers/shutdown_test.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/langserver"
 	"github.com/hashicorp/terraform-ls/internal/terraform/exec"
 	"github.com/stretchr/testify/mock"
@@ -34,5 +34,5 @@ func TestShutdown_twice(t *testing.T) {
 
 	ls.CallAndExpectError(t, &langserver.CallRequest{
 		Method: "shutdown", ReqParams: `{}`},
-		code.InvalidRequest.Err())
+		jrpc2.InvalidRequest.Err())
 }
diff --git a/internal/langserver/session/errors.go b/internal/langserver/session/errors.go
index a3f38ca41..1f19ae39c 100644
--- a/internal/langserver/session/errors.go
+++ b/internal/langserver/session/errors.go
@@ -3,10 +3,10 @@ package session
 import (
 	"fmt"
 
-	"github.com/creachadair/jrpc2/code"
+	"github.com/creachadair/jrpc2"
 )
 
-const SessionNotInitialized code.Code = -32002
+const SessionNotInitialized jrpc2.Code = -32002
 
 type unexpectedSessionState struct {
 	ExpectedState sessionState
@@ -27,7 +27,7 @@ func SessionNotInitializedErr(state sessionState) error {
 		return fmt.Errorf("%w: %s", SessionNotInitialized.Err(), uss)
 	}
 	if state == stateDown {
-		return fmt.Errorf("%w: %s", code.InvalidRequest.Err(), uss)
+		return fmt.Errorf("%w: %s", jrpc2.InvalidRequest.Err(), uss)
 	}
 
 	return uss
@@ -35,12 +35,12 @@ func SessionNotInitializedErr(state sessionState) error {
 
 func SessionAlreadyInitializedErr(reqID string) error {
 	return fmt.Errorf("%w: session was already initialized via request ID %s",
-		code.SystemError.Err(), reqID)
+		jrpc2.SystemError.Err(), reqID)
 }
 
 func SessionAlreadyDownErr(reqID string) error {
 	return fmt.Errorf("%w: session was already shut down via request %s",
-		code.InvalidRequest.Err(), reqID)
+		jrpc2.InvalidRequest.Err(), reqID)
 }
 
 type InvalidURIErr struct {