diff --git a/.travis.yml b/.travis.yml
index a7257a90f7..0da68c5539 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ env:
     # ANACONDA_TOKEN with api:write
     - secure: "RJJjjQloUjCSkhII93QM+YAsr6YYq7hPFvlbnT07ogn1NeUPsVCyJ97oiZfKtPgdbd24hdQP/CHfB0HgTTES8n996tN3QWc4hZj0e10kFyIlas9qnkrRYRR1jxGShBDXrLdx/tGh8z1qnnCm1fy+fDhAF7Zerouwy4EA2YEzxdE="
   matrix:
-    - NUMPY_VERSION=1.11.1 SCIPY_VERSION=0.18.0
+    - NUMPY_VERSION=1.11.1 SCIPY_VERSION=0.17.1
 cache:
   directories:
     - $HOME/.cache/.pip/
diff --git a/appveyor.yml b/appveyor.yml
index 4cab028099..aa05778cb5 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -17,14 +17,13 @@ environment:
       PYTHON_ARCH: "64"
       PANDAS_VERSION: "0.18.1"
       NUMPY_VERSION: "1.11"
-      SCIPY_VERSION: "0.18.0"
+      SCIPY_VERSION: "0.17.0"
 
     - PYTHON_VERSION: "3.4"
       PYTHON_ARCH: "64"
       PANDAS_VERSION: "0.18.1"
       NUMPY_VERSION: "1.11"
-      SCIPY_VERSION: "0.18.0"
-
+      SCIPY_VERSION: "0.17.0"
 
 # We always use a 64-bit machine, but can build x86 distributions
 # with the PYTHON_ARCH variable (which is used by CMD_IN_ENV).
diff --git a/etc/requirements.txt b/etc/requirements.txt
index 3844f03571..869a2a398a 100644
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -13,7 +13,7 @@ numpy==1.11.1
 
 # scipy and pandas are required for statsmodels,
 # statsmodels in turn is required for some pandas packages
-scipy==0.18.0
+scipy==0.17.1
 pandas==0.18.1
 pandas-datareader==0.2.1
 # Needed for parts of pandas.stats