diff --git a/dist/linux/appimage/build.sh b/dist/linux/appimage/build.sh
index 947fe56c4..99249cb35 100755
--- a/dist/linux/appimage/build.sh
+++ b/dist/linux/appimage/build.sh
@@ -115,6 +115,7 @@ cp ../common/org.cryptomator.Cryptomator.tray-unlocked.svg Cryptomator.AppDir/us
 cp ../common/org.cryptomator.Cryptomator.desktop Cryptomator.AppDir/usr/share/applications/org.cryptomator.Cryptomator.desktop
 cp ../common/org.cryptomator.Cryptomator.metainfo.xml Cryptomator.AppDir/usr/share/metainfo/org.cryptomator.Cryptomator.metainfo.xml
 cp ../common/application-vnd.cryptomator.vault.xml Cryptomator.AppDir/usr/share/mime/packages/application-vnd.cryptomator.vault.xml
+cp ../common/application-vnd.cryptomator.encrypted.xml Cryptomator.AppDir/usr/share/mime/packages/application-vnd.cryptomator.encrypted.xml
 ln -s usr/share/icons/hicolor/scalable/apps/org.cryptomator.Cryptomator.svg Cryptomator.AppDir/org.cryptomator.Cryptomator.svg
 ln -s usr/share/icons/hicolor/scalable/apps/org.cryptomator.Cryptomator.svg Cryptomator.AppDir/.DirIcon
 ln -s usr/share/applications/org.cryptomator.Cryptomator.desktop Cryptomator.AppDir/org.cryptomator.Cryptomator.desktop
diff --git a/dist/linux/common/application-vnd.cryptomator.encrypted.xml b/dist/linux/common/application-vnd.cryptomator.encrypted.xml
new file mode 100644
index 000000000..2ee72b9f0
--- /dev/null
+++ b/dist/linux/common/application-vnd.cryptomator.encrypted.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
+  <mime-type type="application/vnd.cryptomator.encrypted">
+    <comment>Cryptomator Encrypted Data</comment>
+    <glob pattern="*.c9r"/>
+    <glob pattern="*.c9s"/>
+    <glob pattern="*.c9u"/>
+  </mime-type>
+</mime-info>
diff --git a/dist/linux/debian/cryptomator.install b/dist/linux/debian/cryptomator.install
index 0e7427351..787c5aea0 100644
--- a/dist/linux/debian/cryptomator.install
+++ b/dist/linux/debian/cryptomator.install
@@ -6,4 +6,5 @@ common/org.cryptomator.Cryptomator.tray-unlocked.svg usr/share/icons/hicolor/sca
 common/org.cryptomator.Cryptomator256.png usr/share/icons/hicolor/256x256/apps
 common/org.cryptomator.Cryptomator512.png usr/share/icons/hicolor/512x512/apps
 common/org.cryptomator.Cryptomator.metainfo.xml usr/share/metainfo
-common/application-vnd.cryptomator.vault.xml usr/share/mime/packages
\ No newline at end of file
+common/application-vnd.cryptomator.vault.xml usr/share/mime/packages
+common/application-vnd.cryptomator.encrypted.xml usr/share/mime/packages
\ No newline at end of file
diff --git a/dist/mac/resources/Info.plist b/dist/mac/resources/Info.plist
index d59c3fe73..00487369c 100644
--- a/dist/mac/resources/Info.plist
+++ b/dist/mac/resources/Info.plist
@@ -105,6 +105,7 @@
         <array>
           <string>c9r</string>
           <string>c9s</string>
+          <string>c9u</string>
         </array>
         <key>public.mime-type</key>
         <array>
diff --git a/dist/win/resources/main.wxs b/dist/win/resources/main.wxs
index 1da7be13a..6310c6985 100644
--- a/dist/win/resources/main.wxs
+++ b/dist/win/resources/main.wxs
@@ -94,6 +94,7 @@
               <ns0:MIME ContentType="$(var.ProgIdContentType)" Default="yes"/>
             </ns0:Extension>
             <ns0:Extension Id="c9s" Advertise="no" ContentType="$(var.ProgIdContentType)"/>
+            <ns0:Extension Id="c9u" Advertise="no" ContentType="$(var.ProgIdContentType)"/>
           </ns0:ProgId>
         </ns0:Component>
     </ns0:DirectoryRef>