diff --git a/package-lock.json b/package-lock.json
index d31015fd..9372f856 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -47,7 +47,7 @@
         "@xterm/addon-search": "^0.17.0-beta.213",
         "@xterm/addon-serialize": "^0.15.0-beta.213",
         "@xterm/addon-unicode11": "^0.10.0-beta.213",
-        "@xterm/addon-webgl": "^0.20.0-beta.212",
+        "@xterm/addon-webgl": "^0.20.0-beta.255",
         "@xterm/headless": "^6.1.0-beta.213",
         "@xterm/xterm": "^6.1.0-beta.213",
         "chrome-remote-interface": "^0.34.0",
@@ -4831,12 +4831,12 @@
       }
     },
     "node_modules/@xterm/addon-webgl": {
-      "version": "0.20.0-beta.219",
-      "resolved": "https://registry.npmjs.org/@xterm/addon-webgl/-/addon-webgl-0.20.0-beta.219.tgz",
-      "integrity": "sha512-IaAcDDP0lhHIdYJuTFKZIMsRqlN8iR5U8lW9MiTK4mUAjettqZN2z/tkSsl4yV3GZ9/siOZofDl+GO1TK7y7ww==",
+      "version": "0.20.0-beta.255",
+      "resolved": "https://registry.npmjs.org/@xterm/addon-webgl/-/addon-webgl-0.20.0-beta.255.tgz",
+      "integrity": "sha512-jNQAArGvyMDbL5gKX9wg2B2hbToxENGbquLrRGvwswPWpuZvIJ0nG1Y9mTCeueiJ+OMa8Ir8rx6YA4DylbQHrw==",
       "license": "MIT",
       "peerDependencies": {
-        "@xterm/xterm": "^6.1.0-beta.220"
+        "@xterm/xterm": "^6.1.0-beta.256"
       }
     },
     "node_modules/@xterm/headless": {
@@ -19160,9 +19160,6 @@
         "nan": "^2.23.0"
       }
     },
-    "node_modules/ssh2/node_modules/cpu-features": {
-      "optional": true
-    },
     "node_modules/stable": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/stable/-/stable-0.1.8.tgz",
diff --git a/package.json b/package.json
index e7a5d2f6..6b2c0ce7 100644
--- a/package.json
+++ b/package.json
@@ -124,7 +124,7 @@
     "@xterm/addon-search": "^0.17.0-beta.213",
     "@xterm/addon-serialize": "^0.15.0-beta.213",
     "@xterm/addon-unicode11": "^0.10.0-beta.213",
-    "@xterm/addon-webgl": "^0.20.0-beta.212",
+    "@xterm/addon-webgl": "^0.20.0-beta.255",
     "@xterm/headless": "^6.1.0-beta.213",
     "@xterm/xterm": "^6.1.0-beta.213",
     "chrome-remote-interface": "^0.34.0",
diff --git a/remote/package-lock.json b/remote/package-lock.json
index 7d9d5848..08f17239 100644
--- a/remote/package-lock.json
+++ b/remote/package-lock.json
@@ -33,7 +33,7 @@
         "@xterm/addon-search": "^0.17.0-beta.213",
         "@xterm/addon-serialize": "^0.15.0-beta.213",
         "@xterm/addon-unicode11": "^0.10.0-beta.213",
-        "@xterm/addon-webgl": "^0.20.0-beta.212",
+        "@xterm/addon-webgl": "^0.20.0-beta.255",
         "@xterm/headless": "^6.1.0-beta.213",
         "@xterm/xterm": "^6.1.0-beta.213",
         "cookie": "^0.7.0",
@@ -842,12 +842,12 @@
       }
     },
     "node_modules/@xterm/addon-webgl": {
-      "version": "0.20.0-beta.212",
-      "resolved": "https://registry.npmjs.org/@xterm/addon-webgl/-/addon-webgl-0.20.0-beta.212.tgz",
-      "integrity": "sha512-RzaTYeukTXTJth+Sl7FzCmb8AqiyDrNWNnqG+/300qJbfHYfCMmBlBVZ0yCTSZIWMdgFbgkhmnmBN7Yzs6xoBA==",
+      "version": "0.20.0-beta.255",
+      "resolved": "https://registry.npmjs.org/@xterm/addon-webgl/-/addon-webgl-0.20.0-beta.255.tgz",
+      "integrity": "sha512-jNQAArGvyMDbL5gKX9wg2B2hbToxENGbquLrRGvwswPWpuZvIJ0nG1Y9mTCeueiJ+OMa8Ir8rx6YA4DylbQHrw==",
       "license": "MIT",
       "peerDependencies": {
-        "@xterm/xterm": "^6.1.0-beta.213"
+        "@xterm/xterm": "^6.1.0-beta.256"
       }
     },
     "node_modules/@xterm/headless": {
diff --git a/remote/package.json b/remote/package.json
index a7aa0208..a7c17475 100644
--- a/remote/package.json
+++ b/remote/package.json
@@ -28,7 +28,7 @@
     "@xterm/addon-search": "^0.17.0-beta.213",
     "@xterm/addon-serialize": "^0.15.0-beta.213",
     "@xterm/addon-unicode11": "^0.10.0-beta.213",
-    "@xterm/addon-webgl": "^0.20.0-beta.212",
+    "@xterm/addon-webgl": "^0.20.0-beta.255",
     "@xterm/headless": "^6.1.0-beta.213",
     "@xterm/xterm": "^6.1.0-beta.213",
     "cookie": "^0.7.0",
diff --git a/remote/web/package-lock.json b/remote/web/package-lock.json
index 416722df..4c2e13e6 100644
--- a/remote/web/package-lock.json
+++ b/remote/web/package-lock.json
@@ -21,7 +21,7 @@
         "@xterm/addon-search": "^0.17.0-beta.213",
         "@xterm/addon-serialize": "^0.15.0-beta.213",
         "@xterm/addon-unicode11": "^0.10.0-beta.213",
-        "@xterm/addon-webgl": "^0.20.0-beta.212",
+        "@xterm/addon-webgl": "^0.20.0-beta.255",
         "@xterm/xterm": "^6.1.0-beta.213",
         "jschardet": "3.1.4",
         "katex": "^0.16.47",
@@ -177,12 +177,12 @@
       }
     },
     "node_modules/@xterm/addon-webgl": {
-      "version": "0.20.0-beta.212",
-      "resolved": "https://registry.npmjs.org/@xterm/addon-webgl/-/addon-webgl-0.20.0-beta.212.tgz",
-      "integrity": "sha512-RzaTYeukTXTJth+Sl7FzCmb8AqiyDrNWNnqG+/300qJbfHYfCMmBlBVZ0yCTSZIWMdgFbgkhmnmBN7Yzs6xoBA==",
+      "version": "0.20.0-beta.255",
+      "resolved": "https://registry.npmjs.org/@xterm/addon-webgl/-/addon-webgl-0.20.0-beta.255.tgz",
+      "integrity": "sha512-jNQAArGvyMDbL5gKX9wg2B2hbToxENGbquLrRGvwswPWpuZvIJ0nG1Y9mTCeueiJ+OMa8Ir8rx6YA4DylbQHrw==",
       "license": "MIT",
       "peerDependencies": {
-        "@xterm/xterm": "^6.1.0-beta.213"
+        "@xterm/xterm": "^6.1.0-beta.256"
       }
     },
     "node_modules/@xterm/xterm": {
diff --git a/remote/web/package.json b/remote/web/package.json
index 7921f519..fe7846ff 100644
--- a/remote/web/package.json
+++ b/remote/web/package.json
@@ -16,7 +16,7 @@
     "@xterm/addon-search": "^0.17.0-beta.213",
     "@xterm/addon-serialize": "^0.15.0-beta.213",
     "@xterm/addon-unicode11": "^0.10.0-beta.213",
-    "@xterm/addon-webgl": "^0.20.0-beta.212",
+    "@xterm/addon-webgl": "^0.20.0-beta.255",
     "@xterm/xterm": "^6.1.0-beta.213",
     "jschardet": "3.1.4",
     "katex": "^0.16.47",