diff --git a/CHANGELOG.md b/CHANGELOG.md
index 81a4faa0..806b1b0a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Update `cosign@latest` to 3.1.3.
+
 - Update `coreutils@latest` to 0.10.0.
 
 - Update `cargo-rdme@latest` to 2.2.0.
diff --git a/manifests/cosign.json b/manifests/cosign.json
index 70f7d2a4..59dd004e 100644
--- a/manifests/cosign.json
+++ b/manifests/cosign.json
@@ -27,13 +27,13 @@
     }
   },
   "latest": {
-    "version": "3.1.2"
+    "version": "3.1.3"
   },
   "3": {
-    "version": "3.1.2"
+    "version": "3.1.3"
   },
   "3.1": {
-    "version": "3.1.2"
+    "version": "3.1.3"
   },
   "3.1.3": {
     "x86_64_linux_musl": {