diff --git a/.travis.yml b/.travis.yml
index 152f4a37b2eaad9c2e28b78ae6f93a10d685f915..14697844c315398d56e55fa5c2fd0cd7f9cd573e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,8 @@ install:
 - source ./support/texlive_install.sh
 - pip install PyGithub
 cache:
-  directories:
+- pip
+- directories:
   - "/tmp/texlive"
   - "$HOME/.texlive"
 script:
diff --git a/support/commitUp.sh b/support/commitUp.sh
index 656a569e9b3e4d2838227c265c6263d39eccf546..ae92e48412dc4bdfcd36a9ad859dff4fe2361bfb 100755
--- a/support/commitUp.sh
+++ b/support/commitUp.sh
@@ -4,6 +4,6 @@ gpg --import bibbot.asc
 git config --global user.email "bibbot@ckurs.de"
 git config --global user.name "BibBot"
 git config --global user.signingkey "1617C27854592471"
-git commit -m "Reformat bib file" gipp.bib
+git commit -S -m "Reformat bib file" gipp.bib
 git remote add http https://${GITHUB_TOKEN}@github.com/ag-gipp/bib.git
 git push http HEAD:$TRAVIS_BRANCH