diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 235da2e..07acb93 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -100,27 +100,6 @@ jobs:
         name: gotify-tray.dmg
         path: gotify-tray.dmg
 
-  release:
-    runs-on: ubuntu-latest
-    needs: [build-win64, build-ubuntu, build-debian, build-macos]
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/download-artifact@master
-    - name: Release
-      uses: marvinpinto/action-automatic-releases@latest
-      with:
-        repo_token: "${{ secrets.GITHUB_TOKEN }}"
-        prerelease: false
-        files: |
-          gotify-tray-installer-win.exe
-          gotify-tray_amd64_ubuntu_focal.deb
-          gotify-tray_amd64_ubuntu_hirsute.deb
-          gotify-tray_amd64_ubuntu_impish.deb
-          gotify-tray_amd64_ubuntu_jammy.deb
-          gotify-tray_amd64_debian_bullseye.deb
-          gotify-tray_amd64_debian_bookworm.deb
-          gotify-tray.dmg
-  
   pypi:
     runs-on: ubuntu-latest
     steps:
@@ -141,3 +120,29 @@ jobs:
       uses: pypa/gh-action-pypi-publish@release/v1
       with:
         password: ${{ secrets.PYPI_API_TOKEN }}
+    - name: Upload artifact
+      uses: actions/upload-artifact@v2
+      with:
+        path: dist/gotify_tray-*.whl
+
+  release:
+    runs-on: ubuntu-latest
+    needs: [build-win64, build-ubuntu, build-debian, build-macos, pypi]
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/download-artifact@master
+    - name: Release
+      uses: marvinpinto/action-automatic-releases@latest
+      with:
+        repo_token: "${{ secrets.GITHUB_TOKEN }}"
+        prerelease: false
+        files: |
+          gotify-tray-installer-win.exe
+          gotify-tray_amd64_ubuntu_focal.deb
+          gotify-tray_amd64_ubuntu_hirsute.deb
+          gotify-tray_amd64_ubuntu_impish.deb
+          gotify-tray_amd64_ubuntu_jammy.deb
+          gotify-tray_amd64_debian_bullseye.deb
+          gotify-tray_amd64_debian_bookworm.deb
+          gotify-tray.dmg
+          gotify_tray-*.whl
diff --git a/.github/workflows/develop.yml b/.github/workflows/develop.yml
index 5623d74..3f03028 100644
--- a/.github/workflows/develop.yml
+++ b/.github/workflows/develop.yml
@@ -4,7 +4,6 @@ on:
   push:
     branches-ignore:
       - master
-      - "dependabot/**"
     tags-ignore:
       - '*'
 
@@ -37,6 +36,7 @@ jobs:
         path: gotify-tray-installer-win.exe
 
   build-ubuntu:
+    if: ${{ github.actor != 'dependabot[bot]' }}
     strategy:
       matrix:
         tag: [focal]
@@ -60,6 +60,7 @@ jobs:
         path: gotify-tray_amd64_ubuntu_${{ matrix.tag }}.deb
 
   build-macos:
+    if: ${{ github.actor != 'dependabot[bot]' }}
     runs-on: macos-12
     steps:
     - uses: actions/checkout@v2
@@ -99,5 +100,4 @@ jobs:
     - name: Upload artifact
       uses: actions/upload-artifact@v2
       with:
-        name: gotify_tray.whl
         path: dist/gotify_tray-*.whl
diff --git a/gotify_tray/database/cache.py b/gotify_tray/database/cache.py
index bb321bf..e7ebcd5 100644
--- a/gotify_tray/database/cache.py
+++ b/gotify_tray/database/cache.py
@@ -1,7 +1,7 @@
 import glob
 import logging
 import os
-import time
+import uuid
 
 import requests
 
@@ -35,40 +35,34 @@ class Cache(object):
     def clear(self):
         self.cursor.execute("DELETE FROM cache")
         self.database.commit()
+
+        if not self.cache_dir:
+            logger.error("Cache directory is empty.")
+            return
+
         for filename in glob.glob(self.cache_dir + "/*"):
             os.remove(filename)
 
     def lookup(self, key: str) -> str:
-        q = self.cursor.execute(
-            "SELECT filename, cached_on FROM cache WHERE url=?", (key,)
-        ).fetchone()
-        if q:
+        if q := self.cursor.execute(
+            "SELECT filename FROM cache WHERE url=?", (key,)
+        ).fetchone():
             # Cache hit
-            filename, cached_on = q
-            return filename if os.path.exists(filename) else ""
+            return q["filename"] if os.path.exists(q["filename"]) else ""
         else:
             # Cache miss
             return ""
 
-    def store(
-        self, key: str, response: requests.Response, add_time: bool = True
-    ) -> str:
+    def store(self, key: str, response: requests.Response) -> str:
         # Create a file and store the response contents
-        filename = str(time.time()).replace(".", "") if add_time else ""
-        if "Content-Disposition" in response.headers.keys():
-            filename += response.headers["Content-Disposition"]
-        else:
-            filename += response.url.split("/")[-1]
+        filepath = os.path.join(self.cache_dir, uuid.uuid4().hex)
 
-        filename = "".join([c for c in filename if c.isalpha() or c.isdigit()]).rstrip()
-        filename = os.path.join(self.cache_dir, filename)
-
-        with open(filename, "wb") as f:
+        with open(filepath, "wb") as f:
             f.write(response.content)
 
         self.cursor.execute(
             "INSERT INTO cache (url, filename, cached_on) VALUES(?, ?, datetime('now', 'localtime'))",
-            (key, filename),
+            (key, filepath),
         )
         self.database.commit()
-        return filename
+        return filepath
diff --git a/gotify_tray/database/downloader.py b/gotify_tray/database/downloader.py
index 9e3f959..e3f0147 100644
--- a/gotify_tray/database/downloader.py
+++ b/gotify_tray/database/downloader.py
@@ -22,43 +22,12 @@ class Downloader(object):
         """
         return self.session.get(url)
 
-    def get_bytes(self, url: str, cached: bool = True, add_time: bool = True) -> bytes:
-        """
-        Get the content of an http get request, as bytes.
-        Optionally use the cache.
-        """
-        if cached:
-            # Retrieve from cache
-            filename = self.cache.lookup(url)
-            if filename:
-                with open(filename, "rb") as f:
-                    return f.read()
-
-        try:
-            response = self.get(url)
-        except Exception as e:
-            logger.error(f"get_bytes: downloading {url} failed.: {e}")
-            return b""
-
-        if not response.ok:
-            return b""
-
-        if cached:
-            # Store in cache
-            self.cache.store(url, response, add_time=add_time)
-
-        return response.content
-
-    def get_filename(
-        self, url: str, retrieve_from_cache: bool = True, add_time: bool = True
-    ) -> str:
+    def get_filename(self, url: str) -> str:
         """
         Get the content of an http get request, as a filename.
         """
-        if retrieve_from_cache:
-            filename = self.cache.lookup(url)
-            if filename:
-                return filename
+        if filename := self.cache.lookup(url):
+            return filename
 
         try:
             response = self.get(url)
@@ -66,7 +35,4 @@ class Downloader(object):
             logger.error(f"get_filename: downloading {url} failed.: {e}")
             return ""
 
-        if not response.ok:
-            return ""
-
-        return self.cache.store(url, response, add_time=add_time)
+        return self.cache.store(url, response) if response.ok else ""
diff --git a/gotify_tray/gui/MainApplication.py b/gotify_tray/gui/MainApplication.py
index c01e2ee..d494fa7 100644
--- a/gotify_tray/gui/MainApplication.py
+++ b/gotify_tray/gui/MainApplication.py
@@ -7,7 +7,7 @@ from typing import List, Union
 
 from gotify_tray import gotify
 from gotify_tray.__version__ import __title__
-from gotify_tray.database import Downloader, Settings
+from gotify_tray.database import Cache, Downloader, Settings
 from gotify_tray.tasks import (
     DeleteApplicationMessagesTask,
     DeleteAllMessagesTask,
@@ -308,6 +308,11 @@ class MainApplication(QtWidgets.QApplication):
 
         self.messages_model.clear()
 
+    def refresh_callback(self):
+        # Manual refresh -> also reset the image cache
+        Cache().clear()
+        self.refresh_applications()
+
     def settings_callback(self):
         settings_dialog = SettingsDialog()
         settings_dialog.quit_requested.connect(self.quit)
@@ -343,7 +348,7 @@ class MainApplication(QtWidgets.QApplication):
         self.tray.messageClicked.connect(self.main_window.bring_to_front)
         self.tray.activated.connect(self.tray_activated_callback)
 
-        self.main_window.refresh.connect(self.refresh_applications)
+        self.main_window.refresh.connect(self.refresh_callback)
         self.main_window.delete_all.connect(self.delete_all_messages_callback)
         self.main_window.application_selection_changed.connect(
             self.application_selection_changed_callback
diff --git a/requirements.txt b/requirements.txt
index f054c43..e36d7dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-requests==2.27.1
-websocket-client==1.3.2
-pyqt6==6.3.0
+requests==2.28.1
+websocket-client==1.3.3
+pyqt6==6.3.1
 python-dateutil==2.8.2