diff --git a/le b/le
index 26ff0c6..a33486a 100755
--- a/le
+++ b/le
@@ -2,4 +2,4 @@
 
 subcommand=$1; shift
 
-source "sub/$subcommand" "$@"
+"sub/$subcommand" "$@"
diff --git a/lib/util b/lib/util
new file mode 100644
index 0000000..c04c25b
--- /dev/null
+++ b/lib/util
@@ -0,0 +1,17 @@
+#!syntax bash
+
+err() {
+	printf '%s\n' "$*" >&2
+}
+
+msg() {
+	printf '%s\n' "$*"
+}
+
+set_default() {
+	declare -n _vref=$1
+
+	if ! [[ "$_vref" ]]; then
+		_vref=$2
+	fi
+}
diff --git a/sub/issue b/sub/issue
index e1ff8e5..91574fb 100755
--- a/sub/issue
+++ b/sub/issue
@@ -1,20 +1,6 @@
 #!/usr/bin/env bash
 
-err() {
-	printf '%s\n' "$*" >&2
-}
-
-msg() {
-	printf '%s\n' "$*"
-}
-
-set_default() {
-	declare -n _vref=$1
-
-	if ! [[ "$_vref" ]]; then
-		_vref=$2
-	fi
-}
+source lib/util
 
 gen_san_string() {
 	declare d
diff --git a/sub/renew b/sub/renew
index 8ccf9b5..561f2a8 100755
--- a/sub/renew
+++ b/sub/renew
@@ -1,20 +1,6 @@
 #!/usr/bin/env bash
 
-err() {
-	printf '%s\n' "$*" >&2
-}
-
-msg() {
-	printf '%s\n' "$*"
-}
-
-set_default() {
-	declare -n _vref=$1
-
-	if ! [[ "$_vref" ]]; then
-		_vref=$2
-	fi
-}
+source lib/util
 
 usage() {
 	while read -r line; do printf '%s\n' "$line"; done <<- EOF