diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6c031739..4f93f9be 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.9"]
+        python-version: ["3.5", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.9"]
 
     steps:
     - uses: actions/checkout@v4
@@ -29,6 +29,8 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+      env:
+        PIP_TRUSTED_HOST: "pypi.python.org pypi.org files.pythonhosted.org"
 
     - name: Install dependencies
       run: |
diff --git a/gallery_dl/version.py b/gallery_dl/version.py
index 6557763d..68c16e2c 100644
--- a/gallery_dl/version.py
+++ b/gallery_dl/version.py
@@ -6,5 +6,5 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
-__version__ = "1.27.0"
+__version__ = "1.27.1-dev"
 __variant__ = None