diff --git a/requirements.txt b/requirements.txt
index e165233e7213a44182001cf71dd874be8b6479f7..88d2db8eb7463e5f2218ec0818bcf742ae5e056c 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,3 +14,4 @@ pandas==0.23.3
 m2r==0.2.1
 docutils==0.12
 pyyaml==3.12
+tkinter==8.6