diff --git a/README.md b/README.md
index 2eb13e8..2d82519 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Approvals.bash - Bash Interactive Approval Testing
 
-![Version](https://img.shields.io/badge/version-0.5.0-blue.svg)
+![Version](https://img.shields.io/badge/version-0.5.1-blue.svg)
 [![Build Status](https://github.com/DannyBen/approvals.bash/workflows/Test/badge.svg)](https://github.com/DannyBen/approvals.bash/actions?query=workflow%3ATest)
 
 ---
diff --git a/approvals.bash b/approvals.bash
index 227a51d..9ee20d7 100644
--- a/approvals.bash
+++ b/approvals.bash
@@ -1,4 +1,4 @@
-# approvals.bash v0.5.0
+# approvals.bash v0.5.1
 #
 # Interactive approval testing for Bash.
 # https://github.com/DannyBen/approvals.bash
diff --git a/op.conf b/op.conf
index 128a0b2..54a1730 100644
--- a/op.conf
+++ b/op.conf
@@ -1,8 +1,11 @@
 test: test/approve
 #? run approval tests
 
-shellcheck: shellcheck -x test/approve approvals.bash && echo "PASS"
+shellcheck: shellcheck -x test/approve approvals.bash && green "PASS"
 #? run shellcheck tests
 
-shfmt: shfmt -d -i 2 -ci approvals.bash && echo "PASS"
+shfmt: shfmt -d -i 2 -ci approvals.bash && green "PASS"
 #? run shfmt tests
+
+spell: codespell && green "PASS"
+#? run spell checker