diff --git a/etc/requirements.txt b/etc/requirements.txt
index f9633a12..5e25ea08 100644
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -1,5 +1,5 @@
 # Logging
-Logbook==0.9.0
+Logbook==0.6.0
 
 # Scientific Libraries