diff --git a/packages/react-native/ReactCommon/jsc/JSCRuntime.cpp b/packages/react-native/ReactCommon/jsc/JSCRuntime.cpp
index 9e188fad527..46528bad745 100644
--- a/packages/react-native/ReactCommon/jsc/JSCRuntime.cpp
+++ b/packages/react-native/ReactCommon/jsc/JSCRuntime.cpp
@@ -18,8 +18,7 @@
 #include <sstream>
 #include <thread>
 
-namespace facebook {
-namespace jsc {
+namespace facebook::jsc {
 
 namespace detail {
 class ArgsConverter;
@@ -1582,5 +1581,4 @@ std::unique_ptr<jsi::Runtime> makeJSCRuntime() {
   return std::make_unique<JSCRuntime>();
 }
 
-} // namespace jsc
-} // namespace facebook
+} // namespace facebook::jsc
diff --git a/packages/react-native/ReactCommon/jsc/JSCRuntime.h b/packages/react-native/ReactCommon/jsc/JSCRuntime.h
index 1d6b2259fcd..281b5558c89 100644
--- a/packages/react-native/ReactCommon/jsc/JSCRuntime.h
+++ b/packages/react-native/ReactCommon/jsc/JSCRuntime.h
@@ -10,10 +10,8 @@
 #include <jsi/jsi.h>
 #include <memory.h>
 
-namespace facebook {
-namespace jsc {
+namespace facebook::jsc {
 
 std::unique_ptr<jsi::Runtime> makeJSCRuntime();
 
-} // namespace jsc
-} // namespace facebook
+} // namespace facebook::jsc