diff --git a/package.json b/package.json
index 1163140..3675713 100644
--- a/package.json
+++ b/package.json
@@ -32,8 +32,8 @@
   },
   "devDependencies": {
     "@aureooms/js-integer": "6.0.0",
-    "@aureooms/js-number": "^3.1.0",
-    "@aureooms/js-prime": "^4.0.0",
+    "@aureooms/js-number": "3.1.0",
+    "@aureooms/js-prime": "4.0.0",
     "@babel/cli": "7.8.4",
     "@babel/core": "7.9.6",
     "@babel/polyfill": "7.8.7",
diff --git a/yarn.lock b/yarn.lock
index 410583f..ada2fe8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -35,12 +35,12 @@
     "@aureooms/js-collections-deque" "^4.0.0"
     "@aureooms/js-error" "^4.0.0"
 
-"@aureooms/js-number@^3.1.0":
+"@aureooms/js-number@3.1.0":
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/@aureooms/js-number/-/js-number-3.1.0.tgz#460155de73084d25e648680309d9d1d941e3df89"
   integrity sha512-Z+Dmml9TjuhnxaOIWu8OZ3iYFPJsLJNynv1qgwYTO7dsZznMPge1ME5VmFeTNNsZSg9DtavXVyfYla+XxWXHRg==
 
-"@aureooms/js-prime@^4.0.0":
+"@aureooms/js-prime@4.0.0":
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/@aureooms/js-prime/-/js-prime-4.0.0.tgz#95ceb59a67ca009afb76b3045daab174b40f24f2"
   integrity sha512-U5Hji39rqTK+ktMTQZvSx/AhX09wLj3ESQPl7fep/ip/FMskeaHtCK8zAQ6QcneLDBCHOMV0x6C9CckWqiCzag==