diff --git a/CloudronManifest.json b/CloudronManifest.json
index 88934fe..8ac176c 100644
--- a/CloudronManifest.json
+++ b/CloudronManifest.json
@@ -6,7 +6,7 @@
   "changelog": "file://CHANGELOG",
   "tagline": "Federated social network",
   "version": "1.17.5",
-  "upstreamVersion": "4.5.5",
+  "upstreamVersion": "4.5.6",
   "healthCheckPath": "/about",
   "httpPort": 8000,
   "memoryLimit": 1610612736,
diff --git a/Dockerfile b/Dockerfile
index 12a689e..2815ac9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -68,7 +68,7 @@ RUN mkdir -p /app/code /app/pkg
 WORKDIR /app/code
 
 # renovate: datasource=github-releases depName=tootsuite/mastodon versioning=semver extractVersion=^v(?<version>.+)$
-ARG MASTODON_VERSION=4.5.5
+ARG MASTODON_VERSION=4.5.6
 
 ENV RAILS_ENV production
 ENV NODE_ENV production
diff --git a/test/package-lock.json b/test/package-lock.json
index 0897770..082b879 100644
--- a/test/package-lock.json
+++ b/test/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
-        "chromedriver": "^143.0.4"
+        "chromedriver": "^145.0.0"
       },
       "devDependencies": {
         "expect.js": "^0.3.1",
@@ -341,9 +341,9 @@
       }
     },
     "node_modules/chromedriver": {
-      "version": "143.0.4",
-      "resolved": "https://registry.npmjs.org/chromedriver/-/chromedriver-143.0.4.tgz",
-      "integrity": "sha512-mE++40DprY2n4d3OPxzW7ujIFRY9eLYwJf4uBgQtMaJQkapSVXRzUrLzSMcRaybrt47Y1t8xW5AKoaUIL3aYZw==",
+      "version": "145.0.0",
+      "resolved": "https://registry.npmjs.org/chromedriver/-/chromedriver-145.0.0.tgz",
+      "integrity": "sha512-rnqHS3u+OEdhaS3PmV7V8KYHBLiIOrIKMkRZSEaQcQXnpqHQTPBrS/1x7r0MJvuywtv2qFQYNbd5yXUmuxFvmg==",
       "hasInstallScript": true,
       "license": "Apache-2.0",
       "dependencies": {
@@ -2224,9 +2224,9 @@
       }
     },
     "chromedriver": {
-      "version": "143.0.4",
-      "resolved": "https://registry.npmjs.org/chromedriver/-/chromedriver-143.0.4.tgz",
-      "integrity": "sha512-mE++40DprY2n4d3OPxzW7ujIFRY9eLYwJf4uBgQtMaJQkapSVXRzUrLzSMcRaybrt47Y1t8xW5AKoaUIL3aYZw==",
+      "version": "145.0.0",
+      "resolved": "https://registry.npmjs.org/chromedriver/-/chromedriver-145.0.0.tgz",
+      "integrity": "sha512-rnqHS3u+OEdhaS3PmV7V8KYHBLiIOrIKMkRZSEaQcQXnpqHQTPBrS/1x7r0MJvuywtv2qFQYNbd5yXUmuxFvmg==",
       "requires": {
         "@testim/chrome-version": "^1.1.4",
         "axios": "^1.12.0",
diff --git a/test/package.json b/test/package.json
index 5195825..b85e91f 100644
--- a/test/package.json
+++ b/test/package.json
@@ -14,6 +14,6 @@
     "selenium-webdriver": "^4.40.0"
   },
   "dependencies": {
-    "chromedriver": "^143.0.4"
+    "chromedriver": "^145.0.0"
   }
 }