diff --git a/.travis.yml b/.travis.yml
index e9ba691..f600e90 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,8 +2,8 @@ version: ~> 1.0
 
 language: python
 python:
+  - '3.8'
   - '3.7'
-  - '2.7'
   - '3.6'
 
 notifications:
@@ -17,7 +17,7 @@ branches:
 
 env:
   global:
-    - CANONICAL_PYTHON="3.7"
+    - CANONICAL_PYTHON="3.8"
     - CANONICAL_MDTRAJ="release"
     - CODECLIMATE=""
     - TWINE_USERNAME="dwhswenson"
@@ -25,7 +25,7 @@ env:
     - secure: "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"
     # AUTORELEASE_TOKEN
     - secure: "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"
-  matrix:
+  jobs:
     - MDTRAJ="release"
     - MDTRAJ="dev"
 
@@ -33,6 +33,8 @@ jobs:
   exclude:
     - env: MDTRAJ="dev"
       python: "3.6"
+    - env: MDTRAJ="dev"
+      python: "3.7"
 
 before_install:
   - echo "before install"
diff --git a/appveyor.yml b/appveyor.yml
index d2eda24..9513a21 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,26 +14,24 @@ environment:
     PYTHONUNBUFFERED: 1
 
   matrix:
-    - PYTHON: "C:\\Miniconda"
-      CONDA_PY: "27"
-      ARCH: '32'
-    - PYTHON: "C:\\Miniconda-x64"
-      CONDA_PY: "27"
-      ARCH: '64'
-    - PYTHON: "C:\\Miniconda36"
-      CONDA_PY: "36" # No MDTraj for py37/Win32
-      ARCH: '32'
+    #- PYTHON: "C:\\Miniconda38-x64"
+      #CONDA_PY: "38" 
+      #ARCH: '64'
     - PYTHON: "C:\\Miniconda37-x64"
       CONDA_PY: "37"
       ARCH: '64'
+    - PYTHON: "C:\\Miniconda36-x64"
+      CONDA_PY: "36" 
+      ARCH: '64'
 
 build: false
 
 install:
-  # install python
+  # set up conda Python
   - SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%
   - conda config --add channels conda-forge
-  - conda install -yq conda=4.5 conda-build=3.10
+  # note: it may become necessary to pin versions of conda/conda-build
+  - conda install -yq conda conda-build
 
 test_script:
   #- "%CMD_IN_ENV% activate base"