diff --git a/cliutils.nim b/cliutils.nim
index 576a87d..1a84d02 100644
--- a/cliutils.nim
+++ b/cliutils.nim
@@ -71,7 +71,7 @@ proc exec*(command: string, workingDir: string = "",
            args: openArray[string] = [], env: StringTableRef = nil,
            options: set[ProcessOption] = {poUsePath},
            msgCB: HandleProcMsgCB = nil): int
-    {.tags: [ExecIOEffect, ReadIOEffect], gcsafe.} =
+    {.tags: [ExecIOEffect, ReadIOEffect, RootEffect], gcsafe.} =
 
   var p = startProcess(command, workingDir, args, env, options)
   result = waitFor(p, msgCB, command)
diff --git a/cliutils.nimble b/cliutils.nimble
index 52a0491..169b4f1 100644
--- a/cliutils.nimble
+++ b/cliutils.nimble
@@ -1,6 +1,6 @@
 # Package
 
-version       = "0.3.0"
+version       = "0.3.1"
 author        = "Jonathan Bernard"
 description   = "Helper functions for writing command line interfaces."
 license       = "MIT"