diff --git a/build.gradle.kts b/build.gradle.kts
index c8033a3..323cdb8 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -19,7 +19,7 @@ buildscript {
 }
 
 allprojects {
-    version = "1.0.4-alpha"
+    version = "1.0.5-alpha"
     group = "io.iohk.atala.prism.didcomm"
 
     repositories {
diff --git a/didpeer/src/commonMain/kotlin/io/iohk/atala/prism/didcomm/didpeer/PeerDIDCreator.kt b/didpeer/src/commonMain/kotlin/io/iohk/atala/prism/didcomm/didpeer/PeerDIDCreator.kt
index 78f1425..a87f259 100644
--- a/didpeer/src/commonMain/kotlin/io/iohk/atala/prism/didcomm/didpeer/PeerDIDCreator.kt
+++ b/didpeer/src/commonMain/kotlin/io/iohk/atala/prism/didcomm/didpeer/PeerDIDCreator.kt
@@ -20,7 +20,7 @@ fun isPeerDID(peerDID: String): Boolean {
     val regex =
         (
             "^did:peer:(([0](z)([1-9a-km-zA-HJ-NP-Z]{46,47}))" +
-                "|(2((.[AEVID](z)([1-9a-km-zA-HJ-NP-Z]{46,47}))+(.(S)[0-9a-zA-Z=]*)?)))$"
+                "|(2((.[AEVID](z)([1-9a-km-zA-HJ-NP-Z]{46,47}))+(.(S)[0-9a-zA-Z=]*)*)))$"
         ).toRegex()
     return regex.matches(peerDID)
 }