diff --git a/lower-constraints.txt b/lower-constraints.txt
index 30fd716d..d227326f 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.10
-appdirs==1.3.0
+appdirs==1.4.3
 astroid==1.3.8
 Babel==2.3.4
 coverage==4.0