diff --git a/packages/react-native/Libraries/Network/RCTNetworking.mm b/packages/react-native/Libraries/Network/RCTNetworking.mm
index 86e80e24cde6..b7fa4bf7975d 100644
--- a/packages/react-native/Libraries/Network/RCTNetworking.mm
+++ b/packages/react-native/Libraries/Network/RCTNetworking.mm
@@ -51,7 +51,7 @@ @implementation RCTHTTPFormDataHelper {
 
 static NSString *RCTGenerateFormBoundary()
 {
-  const size_t boundaryLength = 70;
+  const size_t boundaryLength = 36;
   const char *boundaryChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.";
 
   char *bytes = (char *)malloc(boundaryLength);