diff --git a/parsers/ChangeLog b/parsers/ChangeLog
index 08c45b6c6edbea5607b35eb55f15942e0662278b..de15715f2267baccebf20e685d5535c4f6f63809 100644
--- a/parsers/ChangeLog
+++ b/parsers/ChangeLog
@@ -1,3 +1,10 @@
+Version NEXT:
+XXXX-YY-ZZ RELEASER <admin@example.com>
+    * Breaking
+        - The type of jingle_rtp::Description::ssrc has been changed from
+          Option<String> to Option<u32>, in accordance with XEP-0167 version
+          1.2.3 and RFC 3550. (!602)
+
 Version 0.22.0:
 2025-10-28 pep <pep@bouah.net>
     * Breaking
diff --git a/parsers/doap.xml b/parsers/doap.xml
index 1e1405537661a2974aa0c89745dd5927179ee8bd..03f927c3d9dca1bdd598f4e3bf4980a258bea3ef 100644
--- a/parsers/doap.xml
+++ b/parsers/doap.xml
@@ -267,7 +267,7 @@
         <xmpp:SupportedXep>
             <xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0167.html"/>
             <xmpp:status>complete</xmpp:status>
-            <xmpp:version>1.2.0</xmpp:version>
+            <xmpp:version>1.2.3</xmpp:version>
             <xmpp:since>0.13.0</xmpp:since>
         </xmpp:SupportedXep>
     </implements>
diff --git a/parsers/src/jingle.rs b/parsers/src/jingle.rs
index 5256a51f6263497dc72e1ff235fcd5e0f385e597..6f2dfce11d88c452886a648aa685343596b94362 100644
--- a/parsers/src/jingle.rs
+++ b/parsers/src/jingle.rs
@@ -594,7 +594,7 @@ mod tests {
         assert_size!(Senders, 1);
         assert_size!(Disposition, 1);
         assert_size!(ContentId, 12);
-        assert_size!(Content, 156);
+        assert_size!(Content, 152);
         assert_size!(Reason, 12);
         assert_size!(ReasonElement, 24);
         assert_size!(SessionId, 12);
@@ -609,7 +609,7 @@ mod tests {
         assert_size!(Senders, 1);
         assert_size!(Disposition, 1);
         assert_size!(ContentId, 24);
-        assert_size!(Content, 312);
+        assert_size!(Content, 296);
         assert_size!(Reason, 24);
         assert_size!(ReasonElement, 48);
         assert_size!(SessionId, 24);
diff --git a/parsers/src/jingle_rtp.rs b/parsers/src/jingle_rtp.rs
index 2a65704455cdd30e332052c7367a40a040ad08fa..d655f079c7473cc18ebef7f2473d0ba519d1ac0d 100644
--- a/parsers/src/jingle_rtp.rs
+++ b/parsers/src/jingle_rtp.rs
@@ -21,15 +21,14 @@ pub struct RtcpMux;
 #[derive(FromXml, AsXml, PartialEq, Debug, Clone)]
 #[xml(namespace = ns::JINGLE_RTP, name = "description")]
 pub struct Description {
-    /// Namespace of the encryption scheme used.
+    /// Specifies the media type, such as "audio" or "video", where the media type SHOULD be as
+    /// registered at IANA MIME Media Types Registry.
     #[xml(attribute)]
     pub media: String,
 
-    /// User-friendly name for the encryption scheme, should be `None` for OTR,
-    /// legacy OpenPGP and OX.
-    // XXX: is this a String or an u32?!  Refer to RFC 3550.
+    /// 32-bit synchronization source for this media stream, as defined in RFC 3550.
     #[xml(attribute(default))]
-    pub ssrc: Option<String>,
+    pub ssrc: Option<u32>,
 
     /// List of encodings that can be used for this RTP stream.
     #[xml(child(n = ..))]
@@ -169,7 +168,7 @@ mod tests {
     #[cfg(target_pointer_width = "32")]
     #[test]
     fn test_size() {
-        assert_size!(Description, 76);
+        assert_size!(Description, 72);
         assert_size!(Channels, 1);
         assert_size!(PayloadType, 64);
         assert_size!(Parameter, 24);
@@ -178,7 +177,7 @@ mod tests {
     #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
-        assert_size!(Description, 152);
+        assert_size!(Description, 136);
         assert_size!(Channels, 1);
         assert_size!(PayloadType, 104);
         assert_size!(Parameter, 48);
diff --git a/parsers/src/json_containers.rs b/parsers/src/json_containers.rs
index 42803379f0cd3a2a1473b1afcf8393dc36de251f..665e9d28666e16d960f6a922b8ae1cfbd14d0eb3 100644
--- a/parsers/src/json_containers.rs
+++ b/parsers/src/json_containers.rs
@@ -24,7 +24,7 @@ mod tests {
     #[cfg(target_pointer_width = "32")]
     #[test]
     fn test_size() {
-        assert_size!(JsonContainer, 16);
+        assert_size!(JsonContainer, 24);
     }
 
     #[cfg(target_pointer_width = "64")]