diff --git a/scripts/process-text-files.py b/scripts/process-text-files.py
index 90b4d85..4f1aab2 100644
--- a/scripts/process-text-files.py
+++ b/scripts/process-text-files.py
@@ -354,7 +354,7 @@ class Cmd(jwutils.Cmd):
             #slog(NOTICE, "replacements =", self.replacements)
 
     # overriding
-    def run(self, args):
+    async def run(self, args):
         self._init(args)
         files = []
         if args.name_regex is not None:
@@ -461,7 +461,7 @@ class CmdCppReplaceSymbols(Cmd):
         return p
 
     # overriding
-    def run(self, args):
+    async def run(self, args):
         if args.name_regex is not None:
             return super(CmdCppReplaceSymbols, self).run(args)
         self._init(args)
@@ -547,7 +547,7 @@ class CmdCppAddNamespace(Cmd):
         return p
 
     # overriding
-    def run(self, args):
+    async def run(self, args):
         if args.name_regex is not None:
             return super(CmdCppAddNamespace, self).run(args)
         self._init(args)
diff --git a/scripts/trim-src.py b/scripts/trim-src.py
index 8b7f234..2192a05 100644
--- a/scripts/trim-src.py
+++ b/scripts/trim-src.py
@@ -15,7 +15,7 @@ class TrimSourceCmd(jwutils.Cmd):
         super(TrimSourceCmd, self).__init__(name, help=help)
 
     @abstractmethod
-    def _run(self, args, mime, path, contents):
+    async def _run(self, args, mime, path, contents):
         raise Exception("_run() method not implemented")
 
     def add_parser(self, parsers):
@@ -23,7 +23,7 @@ class TrimSourceCmd(jwutils.Cmd):
         p.add_argument("input", help="input files", nargs='+')
         return p
 
-    def run(self, args):
+    async def run(self, args):
         ms = magic.open(magic.NONE)
         ms.load()
         for path in args.input:
@@ -72,7 +72,7 @@ class CmdBeautify(TrimSourceCmd):
             r += line.rstrip() + '\n'
         return r
 
-    def _run(self, args, mime, path, contents):
+    async def _run(self, args, mime, path, contents):
         slog(NOTICE, "formatting", path, "of type", mime)
         method = getattr(self, '_process' + ''.join(s.capitalize() for s in re.split('[/-]', mime)))
         if method is None:
diff --git a/tools/python/jwutils/Cmd.py b/tools/python/jwutils/Cmd.py
index ae88910..86d2ada 100644
--- a/tools/python/jwutils/Cmd.py
+++ b/tools/python/jwutils/Cmd.py
@@ -7,14 +7,14 @@ ABC = abc.ABCMeta('ABC', (object,), {'__slots__': ()})
 class Cmd(ABC): # export
 
     @abc.abstractmethod
-    def run(self, args):
+    async def run(self, args):
         pass
 
     def __init__(self, name, help):
         self.name = name
         self.help = help
 
-    def _run(self, args):
+    async def _run(self, args):
         pass
 
     def add_parser(self, parsers):
diff --git a/tools/python/jwutils/Cmds.py b/tools/python/jwutils/Cmds.py
index 56ef93b..7e1ff51 100644
--- a/tools/python/jwutils/Cmds.py
+++ b/tools/python/jwutils/Cmds.py
@@ -39,7 +39,7 @@ class Cmds: # export
                 cmd.add_parser(subparsers)
 
     async def __run(self):
-    #def __run(self):
+    #async def __run(self):
         args = self.__parser.parse_args()
         jwutils.log.set_level(args.log_level)
         jwutils.log.set_flags(args.log_flags)