diff --git a/.travis.yml b/.travis.yml
index 7cbbcbf1811ec138eb6a6ba6205760dfef3c9fee..645383894d7ffd3344d2a7a6ab5c0a99feda14bf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ before_install:
   - conda info -a
 install:
   - conda config --add channels conda-forge
-  - conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION obspy pycurl black pytest pytest-cov webtest
+  - conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION obspy pycurl black pytest pytest-cov webtest pydantic
   - source activate test-environment
   - pip install authlib flask flask-login flask-migrate flask-session flask-sqlalchemy psycopg2-binary
 script: