diff --git a/scripts/install b/scripts/install
index 950a52e..3021d7f 100644
--- a/scripts/install
+++ b/scripts/install
@@ -148,6 +148,9 @@ pushd "$final_path"
 	pushd "ghost/admin"
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME="$final_path" yarn build --environment/production # well, except for the admin
 	popd
+
+	# Clean yarn cache (which takes a lot of disk space)
+	rm ./.cache/yarn/* -rf
 popd
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 80d876c..967b2bf 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -193,9 +193,12 @@ then
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME="$final_path" yarn install --non-interactive
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME="$final_path" yarn add knex-migrator ember-cli --dev --ignore-workspace-root-check --non-interactive
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME="$final_path" yarn setup
-        	pushd "ghost/admin"
+		pushd "ghost/admin"
 			ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME="$final_path" yarn build --environment/production
 		popd
+
+		# Clean yarn cache (which takes a lot of disk space)
+		rm ./.cache/yarn/* -rf
 	popd
 fi