diff --git a/app/helper.py b/app/helper.py
index 68daa82..9334906 100644
--- a/app/helper.py
+++ b/app/helper.py
@@ -126,7 +126,7 @@ class PipenvOperation(object):
                         if package.startswith(pip_package.lower()):
                             pkg, pkg_ver = package.split("==")
                             substr = f'{pip_package} = "*"'
-                            content = content.replace(substr, f'{pkg} == "{pkg_ver}"')
+                            content = content.replace(substr, f'{pkg} = "=={pkg_ver}"')
 
             with open(os.path.join(path, "Pipfile"), "w") as f:
                 f.write(content)