diff --git a/extension/package.json b/extension/package.json
index 8cc2468..e107ca3 100644
--- a/extension/package.json
+++ b/extension/package.json
@@ -10,11 +10,11 @@
   ],
   "author": "Akash Ravi",
   "devDependencies": {
-    "css-loader": "^3.2.0",
-    "html-loader": "^0.5.5",
-    "style-loader": "^1.0.0",
-    "webpack": "^4.39.3",
-    "webpack-cli": "^3.3.7"
+    "css-loader": "3.2.0",
+    "html-loader": "0.5.5",
+    "style-loader": "1.0.0",
+    "webpack": "4.41.2",
+    "webpack-cli": "3.3.7"
   },
   "scripts": {
     "webpack": "webpack -p --config webpack.config.js",
diff --git a/extension/requirements.txt b/extension/requirements.txt
index 5dade33..f21d51b 100644
--- a/extension/requirements.txt
+++ b/extension/requirements.txt
@@ -1,3 +1,3 @@
 conda >= 4.5
-notebook >=4.3.1
+notebook==6.0.1
 packaging
diff --git a/extension/yarn.lock b/extension/yarn.lock
index 4e35844..95b3eab 100644
--- a/extension/yarn.lock
+++ b/extension/yarn.lock
@@ -729,7 +729,7 @@ crypto-browserify@^3.11.0:
     randombytes "^2.0.0"
     randomfill "^1.0.3"
 
-css-loader@^3.2.0:
+css-loader@3.2.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-3.2.0.tgz#bb570d89c194f763627fcf1f80059c6832d009b2"
   integrity sha512-QTF3Ud5H7DaZotgdcJjGMvyDj5F3Pn1j/sC6VBEOVp94cbwqyIBdcs/quzj4MC1BKQSrTpQznegH/5giYbhnCQ==
@@ -1303,7 +1303,7 @@ homedir-polyfill@^1.0.1:
   dependencies:
     parse-passwd "^1.0.0"
 
-html-loader@^0.5.5:
+html-loader@0.5.5:
   version "0.5.5"
   resolved "https://registry.yarnpkg.com/html-loader/-/html-loader-0.5.5.tgz#6356dbeb0c49756d8ebd5ca327f16ff06ab5faea"
   integrity sha512-7hIW7YinOYUpo//kSYcPB6dCKoceKLmOwjEMmhIobHuWGDVl0Nwe4l68mdG/Ru0wcUxQjVMEoZpkalZ/SE7zog==
@@ -2771,7 +2771,7 @@ strip-json-comments@~2.0.1:
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
   integrity sha1-PFMZQukIwml8DsNEhYwobHygpgo=
 
-style-loader@^1.0.0:
+style-loader@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/style-loader/-/style-loader-1.0.0.tgz#1d5296f9165e8e2c85d24eee0b7caf9ec8ca1f82"
   integrity sha512-B0dOCFwv7/eY31a5PCieNwMgMhVGFe9w+rh7s/Bx8kfFkrth9zfTZquoYvdw8URgiqxObQKcpW51Ugz1HjfdZw==
@@ -3018,7 +3018,7 @@ watchpack@^1.6.0:
     graceful-fs "^4.1.2"
     neo-async "^2.5.0"
 
-webpack-cli@^3.3.7:
+webpack-cli@3.3.7:
   version "3.3.7"
   resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.7.tgz#77c8580dd8e92f69d635e0238eaf9d9c15759a91"
   integrity sha512-OhTUCttAsr+IZSMVwGROGRHvT+QAs8H6/mHIl4SvhAwYywjiylYjpwybGx7WQ9Hkb45FhjtsymkwiRRbGJ1SZQ==
@@ -3043,10 +3043,10 @@ webpack-sources@^1.4.0, webpack-sources@^1.4.1:
     source-list-map "^2.0.0"
     source-map "~0.6.1"
 
-webpack@^4.39.2:
-  version "4.39.2"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.39.2.tgz#c9aa5c1776d7c309d1b3911764f0288c8c2816aa"
-  integrity sha512-AKgTfz3xPSsEibH00JfZ9sHXGUwIQ6eZ9tLN8+VLzachk1Cw2LVmy+4R7ZiwTa9cZZ15tzySjeMui/UnSCAZhA==
+webpack@4.41.2:
+  version "4.41.2"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.41.2.tgz#c34ec76daa3a8468c9b61a50336d8e3303dce74e"
+  integrity sha512-Zhw69edTGfbz9/8JJoyRQ/pq8FYUoY0diOXqW0T6yhgdhCv6wr0hra5DwwWexNRns2Z2+gsnrNcbe9hbGBgk/A==
   dependencies:
     "@webassemblyjs/ast" "1.8.5"
     "@webassemblyjs/helper-module-context" "1.8.5"