diff --git a/src/xcb/xcb.c b/src/xcb/xcb.c
index 9ca0662..af408ca 100644
--- a/src/xcb/xcb.c
+++ b/src/xcb/xcb.c
@@ -99,6 +99,7 @@ static monitor_rect_t *detect_monitor_rect_by_xinerama(void) {
     }
     prev = m;
   }
+  free(reply);
 
   return list;
 }
@@ -215,9 +216,9 @@ window_list_t *scan_window_list(void) {
   init_ewmh_extension();
 
   xcb_query_tree_cookie_t cookie = xcb_query_tree(conn, screen->root);
-  xcb_query_tree_reply_t *reply = xcb_query_tree_reply(conn, cookie, NULL);
-  xcb_window_t *list = xcb_query_tree_children(reply);
-  int len = xcb_query_tree_children_length(reply);
+  xcb_query_tree_reply_t *tree_reply = xcb_query_tree_reply(conn, cookie, NULL);
+  xcb_window_t *list = xcb_query_tree_children(tree_reply);
+  int len = xcb_query_tree_children_length(tree_reply);
 
   uint32_t count = 0;
   xcb_window_t temp_windoow_array[len];
@@ -226,11 +227,11 @@ window_list_t *scan_window_list(void) {
 
     xcb_get_window_attributes_cookie_t wa_cookie =
       xcb_get_window_attributes(conn, window);
-    xcb_get_window_attributes_reply_t *reply =
+    xcb_get_window_attributes_reply_t *attribute_reply =
       xcb_get_window_attributes_reply(conn, wa_cookie, NULL);
-    uint8_t override_redirect = reply->override_redirect;
-    uint8_t map_state = reply->map_state;
-    free(reply);
+    uint8_t override_redirect = attribute_reply->override_redirect;
+    uint8_t map_state = attribute_reply->map_state;
+    free(attribute_reply);
     if (override_redirect || map_state != XCB_MAP_STATE_VIEWABLE) continue;
 
     xcb_window_t transient_for = XCB_NONE;
@@ -242,6 +243,7 @@ window_list_t *scan_window_list(void) {
     temp_windoow_array[count] = window;
     count++;
   }
+  free(tree_reply);
 
   if (!count) return NULL;
 
@@ -271,6 +273,7 @@ void clean_xcb(void) {
     if (!ewmh_init_failed) {
       xcb_ewmh_connection_wipe(ewmh);
     }
+    free(ewmh);
     ewmh_init_failed = false;
     ewmh = NULL;
   }