diff --git a/.travis.yml b/.travis.yml
index 665d6707a..b15d3cb9a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ env:
     - PYTHON_VERSION="3.5"
   global:
     - DISTRIB="conda"
-      NUMPY_VERSION="1.14" SCIPY_VERSION="0.19"
+      NUMPY_VERSION="1.13" SCIPY_VERSION="0.19"
       SCIKIT_LEARN_VERSION="0.19" MATPLOTLIB_VERSION="2.2"
       SCIKIT_IMAGE_VERSION="0.13" SYMPY_VERSION="1.3"
       STATSMODELS_VERSION="0.8" SEABORN_VERSION="0.7"
diff --git a/environment.yml b/environment.yml
index 300d26489..33e0856af 100644
--- a/environment.yml
+++ b/environment.yml
@@ -3,7 +3,7 @@
 # `./build_tools/requirements_to_environment.py`
 name: testenv
 dependencies:
-- numpy=1.14
+- numpy=1.13
 - scipy=0.19
 - scikit-learn=0.19
 - matplotlib=2.2
diff --git a/requirements.txt b/requirements.txt
index a6eb16538..321119bf0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # This file is structured in a specific way please include all conda installable
 # libraries before the special comment marked `# For conda, pip installable:`
-numpy==1.14
+numpy==1.13
 scipy==0.19
 scikit-learn==0.19
 matplotlib==2.2