diff --git a/.travis.yml b/.travis.yml
index 47f2c25..05191dc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,7 +34,7 @@ jobs:
       env:
         - ACTION=test
     - name: Python 3.9 on Linux
-      python: 3.9
+      python: 3.9-dev
       env:
         - ACTION=test
     - name: Python 3 on macOS
@@ -49,15 +49,15 @@ jobs:
       env:
         - ACTION=test
     - name: Python 3.9 on Linux (sdist in venv)
-      python: 3.9
+      python: 3.9-dev
       env:
         - ACTION=sdisttest
     - name: Python 3.9 on Linux (tracemalloc enabled)
-      python: 3.9
+      python: 3.9-dev
       env:
         - ACTION=tracemalloctest
     - name: Python 3.9 on Linux (Code Coverage)
-      python: 3.9
+      python: 3.9-dev
       env:
         - ACTION=codecov
     # - name: Python 3.7 on Linux (CPyChecker)