diff --git a/scripts/_common.sh b/scripts/_common.sh
index 8f6e28d..9309f85 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -5,7 +5,7 @@
 #=================================================
 
 # dependencies used by the app
-pkg_dependencies="crystal apt-transport-https libssl-dev libxml2-dev libyaml-dev libgmp-dev libreadline-dev postgresql librsvg2-bin libsqlite3-dev zlib1g-dev"
+pkg_dependencies="crystal=0.36.1-1 apt-transport-https libssl-dev libxml2-dev libyaml-dev libgmp-dev libreadline-dev postgresql librsvg2-bin libsqlite3-dev zlib1g-dev"
 
 #=================================================
 # PERSONAL HELPERS