diff --git a/.appveyor.yml b/.appveyor.yml
index 46eb1b4359d..7f99c59442e 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -14,7 +14,7 @@ environment:
     global:
         CONDA_CHANNELS: conda-forge
         CONDA_DEPENDENCIES: pip setuptools wheel cython mock six biopython networkx joblib matplotlib scipy vs2015_runtime pytest mmtf-python GridDataFormats hypothesis pytest-cov codecov
-        PIP_DEPENDENCIES: gsd==1.5.2 duecredit
+        PIP_DEPENDENCIES: duecredit
         DEBUG: "False"
         MINGW_64: C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin
         OPENBLAS_64: https://3f23b170c54c2533c070-1c8a9b3114517dc5fe17b7c3f8c63a43.ssl.cf2.rackcdn.com/openblas-5f998ef_gcc7_1_0_win64.zip
@@ -29,6 +29,10 @@ environment:
           PYTHON_ARCH: 64
           MSVC_VERSION: "Visual Studio 10 Win64"
 
+        - PYTHON_VERSION: 2.7
+          PYTHON_ARCH: 64
+          MSVC_VERSION: "Visual Studio 10 Win64"
+
 init:
     - ps: Write-Host ${env:PYTHON} ${env:PYTHON_VERSION} ${env:PYTHON_ARCH}
     - ps: Write-Host ${env:APPVEYOR_SCHEDULED_BUILD}