diff --git a/platform/chromium/manifest.json b/platform/chromium/manifest.json
index 4369b7bcc..1b55537bb 100644
--- a/platform/chromium/manifest.json
+++ b/platform/chromium/manifest.json
@@ -50,7 +50,7 @@
         }
     ],
     "incognito": "split",
-    "minimum_chrome_version": "38.0",
+    "minimum_chrome_version": "45.0",
     "optional_permissions": [ "file:///*" ],
     "options_page": "dashboard.html",
     "options_ui": {
diff --git a/platform/firefox/install.rdf b/platform/firefox/install.rdf
index c9b9320f8..e478a268a 100644
--- a/platform/firefox/install.rdf
+++ b/platform/firefox/install.rdf
@@ -20,8 +20,8 @@
         <em:targetApplication>
             <Description>
                 <em:id>{{ec8030f7-c20a-464f-9b0e-13a3a9e97384}}</em:id>
-                <em:minVersion>24.0</em:minVersion>
-                <em:maxVersion>57.0a1</em:maxVersion>
+                <em:minVersion>32.0</em:minVersion>
+                <em:maxVersion>56.0a1</em:maxVersion>
             </Description>
         </em:targetApplication>
 
@@ -29,8 +29,8 @@
         <em:targetApplication>
             <Description>
                 <em:id>{{aa3c5121-dab2-40e2-81ca-7ea25febc110}}</em:id>
-                <em:minVersion>27.0</em:minVersion>
-                <em:maxVersion>57.0a1</em:maxVersion>
+                <em:minVersion>32.0</em:minVersion>
+                <em:maxVersion>56.0a1</em:maxVersion>
             </Description>
         </em:targetApplication>