diff --git a/package.json b/package.json
index 8894232c..aef5c22b 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "filesaver.js-npm": "^1.0.1",
     "jquery": "^3.5.1",
     "lodash": "^4.17.19",
-    "newick-js": "^1.1.1",
+    "newick-js": "1.1.1",
     "popper.js": "^1.16.1",
     "vue": "^2.6.11",
     "vue-cookies": "^1.8.1",