diff --git a/backend/package.json b/backend/package.json
index 91e5c6c..99c1b20 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -40,7 +40,7 @@
     "js-base64": "^2.5.1",
     "lowdb": "^1.0.0",
     "mqtt": "^3.0.0",
-    "protobufjs": "^6.11.2",
+    "protobufjs": "~6.11.2",
     "long": "^4.0.0"
   }
 }
\ No newline at end of file
diff --git a/package.json b/package.json
index 41d4dba..44e2e80 100644
--- a/package.json
+++ b/package.json
@@ -115,7 +115,7 @@
     "lowdb": "^1.0.0",
     "mime": "^2.4.4",
     "mqtt": "^3.0.0",
-    "protobufjs": "^6.11.2",
+    "protobufjs": "~6.11.2",
     "sha1": "^1.1.1",
     "yarn-run-all": "^3.1.1"
   },