diff --git a/envs/consts.go b/envs/consts.go
index 754bc02..6ee386f 100644
--- a/envs/consts.go
+++ b/envs/consts.go
@@ -1,11 +1,11 @@
 package envs
 
 import (
-	`regexp`
+	"regexp"
 )
 
 // Compiled regex patterns.
 var (
-	reMaybeInt   *regexp.Regexp = regexp.MustCompilePOSIX(`^(?P<sign>\+|-)[0-9]+$`)
-	reMaybeFloat *regexp.Regexp = regexp.MustCompilePOSIX(`(?P<sign>\+|-)?[0-9]+\.[0-9]+$`)
+	reMaybeInt   *regexp.Regexp = regexp.MustCompile(`^(?P<sign>\+|-)[0-9]+$`)
+	reMaybeFloat *regexp.Regexp = regexp.MustCompile(`(?P<sign>\+|-)?[0-9]+\.[0-9]+$`)
 )