diff --git a/requirements/pip2.7.txt b/requirements/pip2.7.txt
index d0c6ef6..5f55de9 100644
--- a/requirements/pip2.7.txt
+++ b/requirements/pip2.7.txt
@@ -1,2 +1,3 @@
 matplotlib==2.2.4
 enum34==1.1.10
+kiwisolver==1.1.0
\ No newline at end of file
diff --git a/requirements/pip3.txt b/requirements/pip3.txt
index 8cad41e..c4533fd 100644
--- a/requirements/pip3.txt
+++ b/requirements/pip3.txt
@@ -1 +1,2 @@
 matplotlib==3.1.2
+kiwisolver==1.2.0