diff --git a/Cargo.toml b/Cargo.toml
index 8eb378afe428a..6e84df5c693b9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,4 +1,5 @@
 [workspace]
+resolver = "1"
 members = [
   "compiler/rustc",
   "library/std",
diff --git a/library/portable-simd/Cargo.toml b/library/portable-simd/Cargo.toml
index 9802386e4566d..d1732aaec2f92 100644
--- a/library/portable-simd/Cargo.toml
+++ b/library/portable-simd/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace]
-
+resolver = "1"
 members = [
     "crates/core_simd",
     "crates/std_float",
diff --git a/src/ci/docker/host-x86_64/test-various/uefi_qemu_test/Cargo.toml b/src/ci/docker/host-x86_64/test-various/uefi_qemu_test/Cargo.toml
index fa8e5b3d08060..2d17cf7d47a8b 100644
--- a/src/ci/docker/host-x86_64/test-various/uefi_qemu_test/Cargo.toml
+++ b/src/ci/docker/host-x86_64/test-various/uefi_qemu_test/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 edition = "2021"
 
 [workspace]
+resolver = "1"
 
 [dependencies]
 r-efi = "4.1.0"
diff --git a/src/etc/test-float-parse/Cargo.toml b/src/etc/test-float-parse/Cargo.toml
index 7ee19a0b6d913..6d7b227d0ad31 100644
--- a/src/etc/test-float-parse/Cargo.toml
+++ b/src/etc/test-float-parse/Cargo.toml
@@ -5,6 +5,7 @@ edition = "2021"
 publish = false
 
 [workspace]
+resolver = "1"
 
 [dependencies]
 rand = "0.4"