diff --git a/package.json b/package.json
index 49e505523..cadbb07c5 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "canvas-toBlob": "1.0.0",
     "copy-webpack-plugin": "^4.5.1",
     "decode-html": "2.0.0",
-    "diff-match-patch": "^1.0.0",
+    "diff-match-patch": "1.0.0",
     "escape-html": "1.0.3",
     "eslint": "^4.5.0",
     "eslint-config-scratch": "^5.0.0",