diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index 06ebea839..596bd72e4 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -402,8 +402,8 @@ vnstat_enabled: False
 # Calibre E-Book Library
 # WARNING: CALIBRE INSTALLS GRAPHICAL LIBRARIES SIMILAR TO X WINDOWS & OPENGL
 # ON (HEADLESS, SERVER, LITE) OS'S THAT DON'T ALREADY HAVE THESE INSTALLED.
-calibre_install: True
-calibre_enabled: True
+calibre_install: False
+calibre_enabled: False
 # vars/raspbian-9.yml tries the .deb upgrade of Calibre, overriding this default:
 calibre_via_debs: False
 calibre_unstable_debs: False