diff --git a/examples/generated-src/objc/TXSTextboxListener.h b/examples/generated-src/objc/TXSTextboxListener.h
index 140eab31..d72c0661 100644
--- a/examples/generated-src/objc/TXSTextboxListener.h
+++ b/examples/generated-src/objc/TXSTextboxListener.h
@@ -5,7 +5,7 @@
 #import <Foundation/Foundation.h>
 
 
-@protocol TXSTextboxListener
+@protocol TXSTextboxListener <NSObject>
 
 - (void)update:(nonnull TXSItemList *)items;
 
diff --git a/perftest/generated-src/objc/TXSObjectPlatform.h b/perftest/generated-src/objc/TXSObjectPlatform.h
index 246f20f9..3521551c 100644
--- a/perftest/generated-src/objc/TXSObjectPlatform.h
+++ b/perftest/generated-src/objc/TXSObjectPlatform.h
@@ -5,7 +5,7 @@
 
 
 /** interfaces for platform Java or Objective-C objects, to be passed to C++ */
-@protocol TXSObjectPlatform
+@protocol TXSObjectPlatform <NSObject>
 
 - (void)onDone;
 
diff --git a/src/source/Main.scala b/src/source/Main.scala
index 49529053..a59b46cf 100644
--- a/src/source/Main.scala
+++ b/src/source/Main.scala
@@ -84,6 +84,7 @@ object Main {
     var objcppFunctionPrologueFile: Option[String] = None
     var objcppDisableExceptionTranslation: Boolean = false
     var objcFileIdentStyleOptional: Option[IdentConverter] = None
+    var objcStrictProtocol: Boolean = true
     var objcppNamespace: String = "djinni_generated"
     var objcBaseLibIncludePrefix: String = ""
     var wasmOutFolder: Option[File] = None
@@ -202,6 +203,9 @@ object Main {
         .text("Disable generating Objective-C class init helper method.")
       opt[Boolean]("objc-closed-enums").valueName("<true/false>").foreach(x => objcClosedEnums = x)
         .text("All generated Objective-C enums will be NS_CLOSED_ENUM (default: false). ")
+      opt[Boolean]("objc-strict-protocols")
+        .valueName("<true/false>").foreach(x => objcStrictProtocol = x)
+        .text("All generated @protocol will implement <NSObject> (default: true). ")
       note("")
       opt[File]("objcpp-out").valueName("<out-folder>").foreach(x => objcppOutFolder = Some(x))
         .text("The output folder for private Objective-C++ files (Generator disabled if unspecified).")
@@ -416,6 +420,7 @@ object Main {
       objcGenProtocol,
       objcDisableClassCtor,
       objcClosedEnums,
+      objcStrictProtocol,
       wasmOutFolder,
       wasmIncludePrefix,
       wasmIncludeCppPrefix,
diff --git a/src/source/ObjcGenerator.scala b/src/source/ObjcGenerator.scala
index d9174dd6..79419b1c 100644
--- a/src/source/ObjcGenerator.scala
+++ b/src/source/ObjcGenerator.scala
@@ -135,7 +135,12 @@ class ObjcGenerator(spec: Spec) extends BaseObjcGenerator(spec) {
 
       w.wl
       writeDoc(w, doc)
-      if (useProtocol(i.ext, spec)) w.wl(s"@protocol $self") else w.wl(s"@interface $self : NSObject")
+      if (useProtocol(i.ext, spec)) {
+        val baseProtocol = if (spec.objcStrictProtocol) " <NSObject>" else ""
+        w.wl(s"@protocol $self$baseProtocol")
+      } else {
+        w.wl(s"@interface $self : NSObject")
+      }
 
       for (m <- i.methods) {
         if (!m.static || (!spec.objcGenProtocol && m.lang.objc)) {
diff --git a/src/source/generator.scala b/src/source/generator.scala
index 42526dde..5bd55f5a 100644
--- a/src/source/generator.scala
+++ b/src/source/generator.scala
@@ -88,6 +88,7 @@ package object generatorTools {
                    objcGenProtocol: Boolean,
                    objcDisableClassCtor: Boolean,
                    objcClosedEnums: Boolean,
+                   objcStrictProtocol: Boolean,
                    wasmOutFolder: Option[File],
                    wasmIncludePrefix: String,
                    wasmIncludeCppPrefix: String,
diff --git a/test-suite/generated-src/objc/DBAsyncInterface.h b/test-suite/generated-src/objc/DBAsyncInterface.h
index ab6d81da..320068e0 100644
--- a/test-suite/generated-src/objc/DBAsyncInterface.h
+++ b/test-suite/generated-src/objc/DBAsyncInterface.h
@@ -5,7 +5,7 @@
 #import <Foundation/Foundation.h>
 
 
-@protocol DBAsyncInterface
+@protocol DBAsyncInterface <NSObject>
 
 - (nonnull DJFuture<NSString *> *)futureRoundtrip:(nonnull DJFuture<NSNumber *> *)f;
 
diff --git a/test-suite/generated-src/objc/DBClientInterface.h b/test-suite/generated-src/objc/DBClientInterface.h
index fcf20da9..64d7917d 100644
--- a/test-suite/generated-src/objc/DBClientInterface.h
+++ b/test-suite/generated-src/objc/DBClientInterface.h
@@ -7,7 +7,7 @@
 
 
 /** Client interface */
-@protocol DBClientInterface
+@protocol DBClientInterface <NSObject>
 
 /** Returns record of given string */
 - (nonnull DBClientReturnedRecord *)getRecord:(int64_t)recordId
diff --git a/test-suite/generated-src/objc/DBEnumUsageInterface.h b/test-suite/generated-src/objc/DBEnumUsageInterface.h
index 68493c21..d0f8400f 100644
--- a/test-suite/generated-src/objc/DBEnumUsageInterface.h
+++ b/test-suite/generated-src/objc/DBEnumUsageInterface.h
@@ -5,7 +5,7 @@
 #import <Foundation/Foundation.h>
 
 
-@protocol DBEnumUsageInterface
+@protocol DBEnumUsageInterface <NSObject>
 
 - (DBColor)e:(DBColor)e;
 
diff --git a/test-suite/generated-src/objc/DBExternInterface2.h b/test-suite/generated-src/objc/DBExternInterface2.h
index 59f4f6e7..8ffff680 100644
--- a/test-suite/generated-src/objc/DBExternInterface2.h
+++ b/test-suite/generated-src/objc/DBExternInterface2.h
@@ -6,7 +6,7 @@
 #import <Foundation/Foundation.h>
 
 
-@protocol DBExternInterface2
+@protocol DBExternInterface2 <NSObject>
 
 - (nonnull DBExternRecordWithDerivings *)foo:(nullable DBTestHelpers *)i;
 
diff --git a/test-suite/generated-src/objc/DBFirstListener.h b/test-suite/generated-src/objc/DBFirstListener.h
index f660d649..9c338a0b 100644
--- a/test-suite/generated-src/objc/DBFirstListener.h
+++ b/test-suite/generated-src/objc/DBFirstListener.h
@@ -5,7 +5,7 @@
 
 
 /** Used for ObjC multiple inheritance tests */
-@protocol DBFirstListener
+@protocol DBFirstListener <NSObject>
 
 - (void)first;
 
diff --git a/test-suite/generated-src/objc/DBObjcOnlyListener.h b/test-suite/generated-src/objc/DBObjcOnlyListener.h
index b344bd00..673386c4 100644
--- a/test-suite/generated-src/objc/DBObjcOnlyListener.h
+++ b/test-suite/generated-src/objc/DBObjcOnlyListener.h
@@ -4,6 +4,6 @@
 #import <Foundation/Foundation.h>
 
 
-@protocol DBObjcOnlyListener
+@protocol DBObjcOnlyListener <NSObject>
 
 @end
diff --git a/test-suite/generated-src/objc/DBSecondListener.h b/test-suite/generated-src/objc/DBSecondListener.h
index c35985db..4b2b1870 100644
--- a/test-suite/generated-src/objc/DBSecondListener.h
+++ b/test-suite/generated-src/objc/DBSecondListener.h
@@ -5,7 +5,7 @@
 
 
 /** Used for ObjC multiple inheritance tests */
-@protocol DBSecondListener
+@protocol DBSecondListener <NSObject>
 
 - (void)second;
 
diff --git a/test-suite/generated-src/objc/DBUserToken.h b/test-suite/generated-src/objc/DBUserToken.h
index 38ad4952..23a9d08e 100644
--- a/test-suite/generated-src/objc/DBUserToken.h
+++ b/test-suite/generated-src/objc/DBUserToken.h
@@ -4,7 +4,7 @@
 #import <Foundation/Foundation.h>
 
 
-@protocol DBUserToken
+@protocol DBUserToken <NSObject>
 
 - (nonnull NSString *)whoami;
 
diff --git a/test-suite/generated-src/objc/DBUsesSingleLanguageListeners.h b/test-suite/generated-src/objc/DBUsesSingleLanguageListeners.h
index 51e55596..e2dc7291 100644
--- a/test-suite/generated-src/objc/DBUsesSingleLanguageListeners.h
+++ b/test-suite/generated-src/objc/DBUsesSingleLanguageListeners.h
@@ -10,7 +10,7 @@
  * Generating and compiling this makes sure other languages don't break
  * on references to interfaces they don't need.
  */
-@protocol DBUsesSingleLanguageListeners
+@protocol DBUsesSingleLanguageListeners <NSObject>
 
 - (void)callForObjC:(nullable id<DBObjcOnlyListener>)l;