diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 62db97dc..dfb635e5 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -15,8 +15,8 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="aa02d59d-36aa-40fc-bbf5-62a4f7f013a5" name="Changes" comment="">
-      <change beforePath="$PROJECT_DIR$/.github/workflows/dioxus-build.yml" beforeDir="false" afterPath="$PROJECT_DIR$/.github/workflows/dioxus-build.yml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/contracts/room-contract/Cargo.toml" beforeDir="false" afterPath="$PROJECT_DIR$/contracts/room-contract/Cargo.toml" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -229,7 +229,7 @@
       <workItem from="1733403091547" duration="1293000" />
       <workItem from="1733415463842" duration="401000" />
       <workItem from="1733447781995" duration="3000" />
-      <workItem from="1733794537590" duration="9637000" />
+      <workItem from="1733794537590" duration="9861000" />
     </task>
     <servers />
   </component>
diff --git a/contracts/room-contract/Cargo.toml b/contracts/room-contract/Cargo.toml
index 7a3a5032..0f735ec3 100644
--- a/contracts/room-contract/Cargo.toml
+++ b/contracts/room-contract/Cargo.toml
@@ -5,11 +5,10 @@ edition = "2021"
 
 [dependencies]
 common.workspace = true
-serde.workspace = true
 ciborium.workspace = true
-itertools.workspace = true
-getrandom = { workspace = true, features = ["js"] }
+getrandom.workspace = true
 freenet-scaffold = { path = "../../scaffold" }
+freenet-stdlib = { path = "../../stdlib/rust", features = ["contract"] }
 
 [lib]
 crate-type = ["cdylib"]
@@ -20,5 +19,3 @@ opt-level = 'z'
 panic = 'abort'
 strip = true
 
-# Internal dependencies
-freenet-stdlib = { path = "../../stdlib/rust", features = ["net"] }
diff --git a/contracts/room-contract/src/lib.rs b/contracts/room-contract/src/lib.rs
index 17b3093d..e3d4a32c 100644
--- a/contracts/room-contract/src/lib.rs
+++ b/contracts/room-contract/src/lib.rs
@@ -64,7 +64,7 @@ impl ContractInterface for Contract {
                     let delta = from_reader::<ChatRoomStateV1Delta, &[u8]>(d.as_ref())
                         .map_err(|e| ContractError::Deser(e.to_string()))?;
                     chat_state
-                        .apply_delta(&chat_state.clone(), &parameters, &delta)
+                        .apply_delta(&chat_state.clone(), &parameters, &Some(delta))
                         .map_err(|_| ContractError::InvalidUpdate)?;
                 }
                 UpdateData::RelatedState {