diff --git a/.travis.yml b/.travis.yml
index d822780cd33856071811703be07e14825c47e713..9671411b482997b2253c45e96f7449b592dfc644 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -124,6 +124,10 @@ install:
   - if [[ "$COVERAGE_OPTIONS" != "" ]]; then pip install --user cpp-coveralls; fi
   ## If we're on OSX, and using asciidoc, install asciidoc
   - if [[ "$ASCIIDOC_OPTIONS" == "" ]] && [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install asciidoc; fi
+  ##
+  ## Finally, list installed package versions
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then dpkg-query --show; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew list --versions; fi
 
 script:
   - ./autogen.sh