diff --git a/pkg/util/useragent_roundtripper.go b/pkg/util/useragent_roundtripper.go
index f062e3548..96c96199f 100644
--- a/pkg/util/useragent_roundtripper.go
+++ b/pkg/util/useragent_roundtripper.go
@@ -4,19 +4,19 @@ import (
 	"net/http"
 )
 
+// CertManagerUserAgent is the user agent that http clients in this codebase should use
+var CertManagerUserAgent = "jetstack-cert-manager/" + version()
+
 // UserAgentRoundTripper implements the http.RoundTripper interface and adds a User-Agent
 // header.
 type userAgentRoundTripper struct {
 	inner http.RoundTripper
 }
 
-// CertManagerUserAgent is the user agent that http clients in this codebase should use
-const CertManagerUserAgent = "jetstack-cert-manager/" + AppVersion
-
 // UserAgentRoundTripper returns a RoundTripper that functions identically to
 // the provided 'inner' round tripper, other than also setting a user agent.
 func UserAgentRoundTripper(inner http.RoundTripper) http.RoundTripper {
-	return UserAgentRoundTripper{
+	return userAgentRoundTripper{
 		inner: inner,
 	}
 }
diff --git a/pkg/util/version.go b/pkg/util/version.go
index 3ab75874b..c516efc06 100644
--- a/pkg/util/version.go
+++ b/pkg/util/version.go
@@ -1,7 +1,20 @@
 package util
 
+import "fmt"
+
 var (
 	AppGitState  = ""
 	AppGitCommit = ""
 	AppVersion   = "canary"
 )
+
+func version() string {
+	v := AppVersion
+	if AppGitCommit != "" {
+		v += "-" + AppGitCommit
+	}
+	if AppGitState != "" {
+		v += fmt.Sprintf(" (%v)", AppGitState)
+	}
+	return v
+}