diff --git a/requirements.txt b/requirements.txt
index 2ede24f4..c86a90de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,4 +40,5 @@ XlsxWriter==0.9.3
 xlwt==1.3.*
 xlrd==1.0.0
 unittest2==1.1.0
+numpy==1.14.3
 pypiwin32 ; sys_platform == 'win32'
diff --git a/setup/win32/winpy_requirements.txt b/setup/win32/winpy_requirements.txt
index 4a615ad1..cae2a64f 100644
--- a/setup/win32/winpy_requirements.txt
+++ b/setup/win32/winpy_requirements.txt
@@ -37,3 +37,4 @@ Werkzeug>=0.11.11
 XlsxWriter==0.9.3
 xlwt==1.3.*
 xlrd==1.0.0
+numpy==1.14.3