diff --git a/library/src/config.rs b/library/src/config.rs
index 3a1b1437..a3672d73 100644
--- a/library/src/config.rs
+++ b/library/src/config.rs
@@ -86,6 +86,7 @@ pub struct UpdateConfig {
     pub file_provider: Box<dyn ExternalFileProvider>,
     pub patch_public_key: Option<String>,
     pub patch_verification: PatchVerificationMode,
+    pub module_version: Option<String>,
 }
 
 /// Returns Ok if the config was set successfully, Err if it was already set.
@@ -129,6 +130,7 @@ pub fn set_config(
             file_provider,
             patch_public_key: yaml.patch_public_key.to_owned(),
             patch_verification: yaml.patch_verification.unwrap_or_default(),
+            module_version: yaml.module_version.to_owned(),
         };
         shorebird_debug!("Updater configured with: {:?}", new_config);
         *config = Some(new_config);
@@ -198,6 +200,7 @@ mod tests {
             base_url: Some("fake_base_url".to_string()),
             patch_public_key: None,
             patch_verification: None,
+            module_version: None,
         }
     }
 
@@ -223,6 +226,7 @@ mod tests {
                 base_url: Some("fake_base_url".to_string()),
                 patch_public_key: Some("patch_public_key".to_string()),
                 patch_verification: None,
+                module_version: None,
             },
             NetworkHooks::default(),
         )?;
diff --git a/library/src/network.rs b/library/src/network.rs
index 2248bd3d..66583f48 100644
--- a/library/src/network.rs
+++ b/library/src/network.rs
@@ -247,6 +247,11 @@ pub struct PatchCheckRequest {
     /// The unique ID of this device. This is a random UUID generated by Shorebird and _not_ the
     /// device's UUID or any other identifier that has meaning outside of Shorebird.
     pub client_id: String,
+    /// Module version for add-to-app releases (AAR/iOS framework).
+    /// When present, used instead of release_version for patch lookup.
+    /// The release_version still contains the host app's version for analytics.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub module_version: Option<String>,
     // We specifically do not send a patch number as part of this request because we always want to
     // know what the latest available patch is.
 }
@@ -260,6 +265,7 @@ impl PatchCheckRequest {
             platform: current_platform().to_string(),
             arch: current_arch().to_string(),
             client_id: client_id.to_string(),
+            module_version: config.module_version.clone(),
         }
     }
 }
@@ -404,6 +410,7 @@ mod tests {
                 platform: "".to_string(),
                 arch: "".to_string(),
                 client_id: "".to_string(),
+                module_version: None,
             },
         );
         assert!(result.is_err());
diff --git a/library/src/yaml.rs b/library/src/yaml.rs
index 85cc082c..581b726e 100644
--- a/library/src/yaml.rs
+++ b/library/src/yaml.rs
@@ -27,6 +27,9 @@ pub struct YamlConfig {
     pub patch_public_key: Option<String>,
     /// When to verify patch signatures. Defaults to "strict" (verify at boot time).
     pub patch_verification: Option<PatchVerificationMode>,
+    /// Module version for add-to-app releases (AAR/iOS framework).
+    /// When present, used instead of release_version for patch lookup.
+    pub module_version: Option<String>,
 }
 
 impl YamlConfig {
@@ -42,6 +45,7 @@ impl YamlConfig {
         let mut auto_update: Option<bool> = None;
         let mut patch_public_key: Option<String> = None;
         let mut patch_verification: Option<PatchVerificationMode> = None;
+        let mut module_version: Option<String> = None;
 
         for line in yaml.lines() {
             let line = line.trim();
@@ -75,6 +79,7 @@ impl YamlConfig {
                         }
                     });
                 }
+                "module_version" => module_version = Some(value.to_string()),
                 _ => {} // Ignore unknown keys for forward compatibility.
             }
         }
@@ -88,6 +93,7 @@ impl YamlConfig {
             auto_update,
             patch_public_key,
             patch_verification,
+            module_version,
         })
     }
 }
@@ -161,6 +167,7 @@ base_url: https://example.com
 auto_update: false
 patch_public_key: abc123
 patch_verification: install_only
+module_version: 1.2.3
 "#;
         let config = YamlConfig::from_yaml(yaml).unwrap();
         assert_eq!(config.app_id, "my_app");
@@ -172,6 +179,14 @@ patch_verification: install_only
             config.patch_verification,
             Some(PatchVerificationMode::InstallOnly)
         );
+        assert_eq!(config.module_version.as_deref(), Some("1.2.3"));
+    }
+
+    #[test]
+    fn module_version_defaults_to_none() {
+        let yaml = "app_id: test_app\n";
+        let config = YamlConfig::from_yaml(yaml).unwrap();
+        assert_eq!(config.module_version, None);
     }
 
     #[test]