diff --git a/.travis.yml b/.travis.yml
index 002dd6f..d20c769 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,15 +50,20 @@ matrix:
         - PLAT=i686
     - os: osx
       language: generic
-      env: MB_PYTHON_VERSION=2.7
+      env:
+        - MB_PYTHON_VERSION=2.7
+        - MACOSX_DEPLOYMENT_TARGET=10.6 # since pandas PR24274, mac builds default to 10.9
     - os: osx
       language: generic
       env:
         - MB_PYTHON_VERSION=3.5
+        - MACOSX_DEPLOYMENT_TARGET=10.6 # since pandas PR24274, mac builds default to 10.9
     - os: osx
       language: generic
       env:
         - MB_PYTHON_VERSION=3.6
+        - MACOSX_DEPLOYMENT_TARGET=10.6 # since pandas PR24274, mac builds default to 10.9
+
 
 
 before_install: