diff --git a/README.md b/README.md
index e3c2e159..50297faa 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ $ find /tmp/my-app/
 $ cat /tmp/my-app/manifest
 {
     "acKind": "ImageManifest",
-    "acVersion": "0.5.0",
+    "acVersion": "0.5.1",
     "name": "my-app",
     "labels": [
         {"name": "os", "value": "linux"},
@@ -93,7 +93,7 @@ and verify that the manifest was embedded appropriately
 tar xf /tmp/my-app.aci manifest -O | python -m json.tool
 {
     "acKind": "ImageManifest",
-    "acVersion": "0.5.0",
+    "acVersion": "0.5.1",
     "annotations": null,
     "app": {
         "environment": [],
diff --git a/SPEC.md b/SPEC.md
index 064e4c88..8f2c30f0 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -565,7 +565,7 @@ JSON Schema for the Image Manifest (app image manifest, ACI manifest), conformin
 ```
 {
     "acKind": "ImageManifest",
-    "acVersion": "0.5.0",
+    "acVersion": "0.5.1",
     "name": "example.com/reduce-worker",
     "labels": [
         {
@@ -744,7 +744,7 @@ JSON Schema for the Pod Manifest, conforming to [RFC4627](https://tools.ietf.org
 
 ```
 {
-    "acVersion": "0.5.0",
+    "acVersion": "0.5.1",
     "acKind": "PodManifest",
     "apps": [
         {
diff --git a/VERSION b/VERSION
index cbeac127..4b9fcbec 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.5.0+git
+0.5.1
diff --git a/ace/image_manifest_main.json b/ace/image_manifest_main.json
index 7f6b1bf0..3384dccb 100644
--- a/ace/image_manifest_main.json
+++ b/ace/image_manifest_main.json
@@ -1,9 +1,9 @@
 {
-    "acVersion": "0.5.0",
+    "acVersion": "0.5.1",
     "acKind": "ImageManifest",
     "name": "coreos.com/ace-validator-main",
     "labels": [
-        { "name": "version", "value": "0.5.0" },
+        { "name": "version", "value": "0.5.1" },
         { "name": "os", "value": "linux" },
         { "name": "arch", "value": "amd64" }
     ],
diff --git a/ace/image_manifest_sidekick.json b/ace/image_manifest_sidekick.json
index 92bb17d6..b198520a 100644
--- a/ace/image_manifest_sidekick.json
+++ b/ace/image_manifest_sidekick.json
@@ -1,9 +1,9 @@
 {
-    "acVersion": "0.5.0",
+    "acVersion": "0.5.1",
     "acKind": "ImageManifest",
     "name": "coreos.com/ace-validator-sidekick",
     "labels": [
-        { "name": "version", "value": "0.5.0" },
+        { "name": "version", "value": "0.5.1" },
         { "name": "os", "value": "linux" },
         { "name": "arch", "value": "amd64" }
     ],
diff --git a/aci/file_test.go b/aci/file_test.go
index 939fd0ed..f7def459 100644
--- a/aci/file_test.go
+++ b/aci/file_test.go
@@ -14,7 +14,7 @@ func newTestACI(usedotslash bool) (*os.File, error) {
 		return nil, err
 	}
 
-	manifestBody := `{"acKind":"ImageManifest","acVersion":"0.5.0","name":"example.com/app"}`
+	manifestBody := `{"acKind":"ImageManifest","acVersion":"0.5.1","name":"example.com/app"}`
 
 	gw := gzip.NewWriter(tf)
 	tw := tar.NewWriter(gw)
diff --git a/examples/image.json b/examples/image.json
index b497a0cb..61745bb9 100644
--- a/examples/image.json
+++ b/examples/image.json
@@ -1,6 +1,6 @@
 {
     "acKind": "ImageManifest",
-    "acVersion": "0.5.0",
+    "acVersion": "0.5.1",
     "name": "example.com/reduce-worker",
     "labels": [
         {
diff --git a/examples/pod_runtime.json b/examples/pod_runtime.json
index 4d397d03..a626abc4 100644
--- a/examples/pod_runtime.json
+++ b/examples/pod_runtime.json
@@ -1,5 +1,5 @@
 {
-    "acVersion": "0.5.0",
+    "acVersion": "0.5.1",
     "acKind": "PodManifest",
     "apps": [
         {
diff --git a/schema/image_test.go b/schema/image_test.go
index 2d832c9b..fe9d6768 100644
--- a/schema/image_test.go
+++ b/schema/image_test.go
@@ -6,7 +6,7 @@ func TestEmptyApp(t *testing.T) {
 	imj := `
 		{
 		    "acKind": "ImageManifest",
-		    "acVersion": "0.5.0",
+		    "acVersion": "0.5.1",
 		    "name": "example.com/test"
 		}
 		`
diff --git a/schema/version.go b/schema/version.go
index 5d161d5f..d263d543 100644
--- a/schema/version.go
+++ b/schema/version.go
@@ -8,7 +8,7 @@ const (
 	// version represents the canonical version of the appc spec and tooling.
 	// For now, the schema and tooling is coupled with the spec itself, so
 	// this must be kept in sync with the VERSION file in the root of the repo.
-	version string = "0.5.0+git"
+	version string = "0.5.1"
 )
 
 var (