diff --git a/.travis.yml b/.travis.yml
index 3cea9292..ca663414 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,12 +26,12 @@ matrix:
       language: generic
       env:
         - TOX_ENV=py35
-        - PYTHON_VERSION='3.5.9'
+        - PYTHON_VERSION='3.5.8'
     - os: osx
       language: generic
       env:
         - TOX_ENV=py36
-        - PYTHON_VERSION='3.6.10'
+        - PYTHON_VERSION='3.6.9'
     - os: osx
       language: generic
       env:
@@ -41,17 +41,17 @@ matrix:
       language: generic
       env:
         - TOX_ENV=py38
-        - PYTHON_VERSION='3.8.3'
+        - PYTHON_VERSION='3.8.0'
     - os: osx
       language: generic
       env:
         - TOX_ENV=py39
-        - PYTHON_VERSION='3.9.1'
+        - PYTHON_VERSION='miniconda3-3.9.1'
     - os: osx
       language: generic
       env:
         - TOX_ENV=freeze
-        - PYTHON_VERSION='3.5.9'
+        - PYTHON_VERSION='3.5.8'
 
 branches:
   only:
@@ -70,6 +70,7 @@ before_install: |
       if [[ "$TOX_ENV" != "py27" ]]; then
         export PYTHON_CONFIGURE_OPTS="--enable-shared"
       fi
+      pyenv install --list
       pyenv install $PYTHON_VERSION
       export PYENV_VERSION=$PYTHON_VERSION
       pyenv virtualenv venv