diff --git a/pkgs/development/node-packages/node-packages.json b/pkgs/development/node-packages/node-packages.json
index 9ea5b2ec15d9d..3a404c5a8abb3 100644
--- a/pkgs/development/node-packages/node-packages.json
+++ b/pkgs/development/node-packages/node-packages.json
@@ -66,6 +66,7 @@
 , "elm-oracle"
 , "emoj"
 , "emojione"
+, "escape-string-regexp"
 , "eslint"
 , "eslint_d"
 , {"fast-cli": "1.x"}
@@ -80,6 +81,7 @@
 , "gtop"
 , "gulp"
 , "gulp-cli"
+, "he"
 , "html-minifier"
 , "htmlhint"
 , "http-server"
diff --git a/pkgs/development/node-packages/node-packages.nix b/pkgs/development/node-packages/node-packages.nix
index 0fe572892296e..2b279fd76adb8 100644
--- a/pkgs/development/node-packages/node-packages.nix
+++ b/pkgs/development/node-packages/node-packages.nix
@@ -59655,6 +59655,24 @@ in
     bypassCache = true;
     reconstructLock = true;
   };
+  escape-string-regexp = nodeEnv.buildNodePackage {
+    name = "escape-string-regexp";
+    packageName = "escape-string-regexp";
+    version = "4.0.0";
+    src = fetchurl {
+      url = "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-4.0.0.tgz";
+      sha512 = "TtpcNJ3XAzx3Gq8sWRzJaVajRs0uVxA2YAkdb1jm2YkPz4G6egUFAyA3n5vtEIZefPk5Wa4UXbKuS5fKkJWdgA==";
+    };
+    buildInputs = globalBuildInputs;
+    meta = {
+      description = "Escape RegExp special characters";
+      homepage = "https://github.com/sindresorhus/escape-string-regexp#readme";
+      license = "MIT";
+    };
+    production = true;
+    bypassCache = true;
+    reconstructLock = true;
+  };
   eslint = nodeEnv.buildNodePackage {
     name = "eslint";
     packageName = "eslint";
@@ -63212,6 +63230,24 @@ in
     bypassCache = true;
     reconstructLock = true;
   };
+  he = nodeEnv.buildNodePackage {
+    name = "he";
+    packageName = "he";
+    version = "1.2.0";
+    src = fetchurl {
+      url = "https://registry.npmjs.org/he/-/he-1.2.0.tgz";
+      sha512 = "F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==";
+    };
+    buildInputs = globalBuildInputs;
+    meta = {
+      description = "A robust HTML entities encoder/decoder with full Unicode support.";
+      homepage = "https://mths.be/he";
+      license = "MIT";
+    };
+    production = true;
+    bypassCache = true;
+    reconstructLock = true;
+  };
   html-minifier = nodeEnv.buildNodePackage {
     name = "html-minifier";
     packageName = "html-minifier";