diff --git a/nonebot/consts.py b/nonebot/consts.py
index 11e3feaa..5f6fa52b 100644
--- a/nonebot/consts.py
+++ b/nonebot/consts.py
@@ -1,20 +1,22 @@
+from sys import intern
+
 # used by Matcher
-RECEIVE_KEY = "_receive_{id}"
-LAST_RECEIVE_KEY = "_last_receive"
-ARG_KEY = "{key}"
-REJECT_TARGET = "_current_target"
-REJECT_CACHE_TARGET = "_next_target"
+RECEIVE_KEY = intern("_receive_{id}")
+LAST_RECEIVE_KEY = intern("_last_receive")
+ARG_KEY = intern("{key}")
+REJECT_TARGET = intern("_current_target")
+REJECT_CACHE_TARGET = intern("_next_target")
 
 # used by Rule
-PREFIX_KEY = "_prefix"
+PREFIX_KEY = intern("_prefix")
 
-CMD_KEY = "command"
-RAW_CMD_KEY = "raw_command"
-CMD_ARG_KEY = "command_arg"
+CMD_KEY = intern("command")
+RAW_CMD_KEY = intern("raw_command")
+CMD_ARG_KEY = intern("command_arg")
 
-SHELL_ARGS = "_args"
-SHELL_ARGV = "_argv"
+SHELL_ARGS = intern("_args")
+SHELL_ARGV = intern("_argv")
 
-REGEX_MATCHED = "_matched"
-REGEX_GROUP = "_matched_groups"
-REGEX_DICT = "_matched_dict"
+REGEX_MATCHED = intern("_matched")
+REGEX_GROUP = intern("_matched_groups")
+REGEX_DICT = intern("_matched_dict")