diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31bcccbb..bdf888f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,12 +4,12 @@
 
 All notable changes to this project will be documented in this file.
 
-## Unreleased
+## 5.1.0 (2022-07-17)
 
 ### Enhancements
 
 - Added heuristic to detect maliciously added unsigned headers (#102).
-- Warn about unsigned headers that are recommended to be signed (#102, #277).
+- Configurable option to warn about unsigned headers that are recommended to be signed (#102, #277).
 - Improved theming of header icon in Thunderbird 102.
 - Authentication-Results header: Prefer to show failure results that include a reason and are related to the sending domain (#247).
 
diff --git a/manifest.json b/manifest.json
index 0acbf10d..7ade9aa2 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,7 @@
 	"manifest_version": 2,
 	"name": "__MSG_about_name__",
 	"description": "__MSG_about_summary__",
-	"version": "5.0.0",
+	"version": "5.1.0",
 	"author": "Philippe Lieser",
 	"homepage_url": "https://github.com/lieser/dkim_verifier/wiki",
 	"default_locale": "en_US",
@@ -10,7 +10,7 @@
 		"gecko": {
 			"id": "dkim_verifier@pl",
 			"strict_min_version": "91.0",
-			"strict_max_version": "103.0"
+			"strict_max_version": "104.0"
 		}
 	},
 	"permissions": [