diff --git a/packages/react-native/ReactCommon/react/runtime/platform/ios/ReactCommon/RCTJscInstance.h b/packages/react-native/ReactCommon/react/runtime/platform/ios/ReactCommon/RCTJscInstance.h
index bdd653287d0..5732d3e41af 100644
--- a/packages/react-native/ReactCommon/react/runtime/platform/ios/ReactCommon/RCTJscInstance.h
+++ b/packages/react-native/ReactCommon/react/runtime/platform/ios/ReactCommon/RCTJscInstance.h
@@ -9,8 +9,7 @@
 #import <jsi/jsi.h>
 #import <react/runtime/JSRuntimeFactory.h>
 
-namespace facebook {
-namespace react {
+namespace facebook::react {
 
 class RCTJscInstance : public JSRuntimeFactory {
  public:
@@ -21,5 +20,4 @@ class RCTJscInstance : public JSRuntimeFactory {
 
   ~RCTJscInstance(){};
 };
-} // namespace react
-} // namespace facebook
+} // namespace facebook::react
diff --git a/packages/react-native/ReactCommon/react/runtime/platform/ios/ReactCommon/RCTJscInstance.mm b/packages/react-native/ReactCommon/react/runtime/platform/ios/ReactCommon/RCTJscInstance.mm
index c56c466909d..06d61e8bb97 100644
--- a/packages/react-native/ReactCommon/react/runtime/platform/ios/ReactCommon/RCTJscInstance.mm
+++ b/packages/react-native/ReactCommon/react/runtime/platform/ios/ReactCommon/RCTJscInstance.mm
@@ -8,8 +8,7 @@
 #import "RCTJscInstance.h"
 #include <jsc/JSCRuntime.h>
 
-namespace facebook {
-namespace react {
+namespace facebook::react {
 
 RCTJscInstance::RCTJscInstance() {}
 
@@ -18,5 +17,4 @@ std::unique_ptr<JSRuntime> RCTJscInstance::createJSRuntime(std::shared_ptr<Messa
   return std::make_unique<JSIRuntimeHolder>(jsc::makeJSCRuntime());
 }
 
-} // namespace react
-} // namespace facebook
+} // namespace facebook::react