diff --git a/packages/ng-openapi-gen/src/templates/requestBuilder.handlebars b/packages/ng-openapi-gen/src/templates/requestBuilder.handlebars
index 64def08..6b30aa6 100644
--- a/packages/ng-openapi-gen/src/templates/requestBuilder.handlebars
+++ b/packages/ng-openapi-gen/src/templates/requestBuilder.handlebars
@@ -122,9 +122,9 @@ class PathParameter extends Parameter {
   // @ts-ignore
   serializeValue(value: any, separator = ','): string {
     var result = typeof value === 'string' ? encodeURIComponent(value) : super.serializeValue(value, separator);
-    result = result.replace('%3D', '=');
-    result = result.replace('%3B', ';');
-    result = result.replace('%2C', ',');
+    result = result.replace(/%3D/g, '=');
+    result = result.replace(/%3B/g, ';');
+    result = result.replace(/%2C/g, ',');
     return result;
   }
 }