diff --git a/src/steps-config/10-apt-cache.sh b/src/steps-config/10-apt-cache.sh
index c50c888..c51029c 100755
--- a/src/steps-config/10-apt-cache.sh
+++ b/src/steps-config/10-apt-cache.sh
@@ -25,6 +25,11 @@ enable_apt_cache() {
 		subtask_end "$?";
 	fi
 	
+	subtask_begin "Reconfiguring existing apt sources https → http";
+	sed -i 's/https:\/\//http:\/\//g' /etc/apt/sources.list;
+	find /etc/apt/sources.list.d/ -type f -iname '*.list' -print0 | xargs -0 -n1 sed -i 's/https:\/\//http:\/\//g';
+	subtask_end "$?";
+	
 	task_end "$?" "Failed to configure apt cache.";
 }