diff --git a/Cargo.lock b/Cargo.lock
index f4ceae0..9d967c4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2439,7 +2439,7 @@ dependencies = [
 
 [[package]]
 name = "stremio-core-kotlin"
-version = "1.3.1"
+version = "1.4.0"
 dependencies = [
  "Inflector",
  "auto_impl",
diff --git a/stremio-core-kotlin/Cargo.toml b/stremio-core-kotlin/Cargo.toml
index 17edeca..f6059bb 100644
--- a/stremio-core-kotlin/Cargo.toml
+++ b/stremio-core-kotlin/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "stremio-core-kotlin"
-version = "1.3.1"
+version = "1.4.0"
 authors = ["Smart Code OOD"]
 edition = "2021"
 
diff --git a/stremio-core-kotlin/README.md b/stremio-core-kotlin/README.md
index 74cb384..b01316b 100644
--- a/stremio-core-kotlin/README.md
+++ b/stremio-core-kotlin/README.md
@@ -32,6 +32,6 @@ allprojects {
 
 ```gradle
 dependencies {
-    implementation 'com.github.Stremio:stremio-core-kotlin:1.3.1'
+    implementation 'com.github.Stremio:stremio-core-kotlin:1.4.0'
 }
 ```
diff --git a/stremio-core-kotlin/build.gradle.kts b/stremio-core-kotlin/build.gradle.kts
index 22f13f8..1d51fb0 100644
--- a/stremio-core-kotlin/build.gradle.kts
+++ b/stremio-core-kotlin/build.gradle.kts
@@ -1,7 +1,7 @@
 import com.google.protobuf.gradle.*
 
 group = "com.github.Stremio"
-version = "1.3.1"
+version = "1.4.0"
 
 allprojects {
   repositories {
diff --git a/stremio-core-protobuf/proto/stremio/core/models/player.proto b/stremio-core-protobuf/proto/stremio/core/models/player.proto
index 2a34a54..4416a14 100644
--- a/stremio-core-protobuf/proto/stremio/core/models/player.proto
+++ b/stremio-core-protobuf/proto/stremio/core/models/player.proto
@@ -25,7 +25,7 @@ message Player {
 
   message VideoParams {
     optional string hash = 1;
-    optional int64 size = 2;
+    optional uint64 size = 2;
     optional string filename = 3;
   }
   message StreamState {
diff --git a/stremio-core-protobuf/src/bridge.rs b/stremio-core-protobuf/src/bridge.rs
index 7fb611a..6e33eee 100644
--- a/stremio-core-protobuf/src/bridge.rs
+++ b/stremio-core-protobuf/src/bridge.rs
@@ -29,7 +29,7 @@ mod stream;
 mod string;
 mod subtitle;
 
-pub trait ToProtobuf<T, A> {
+pub trait ToProtobuf<T, A = ()> {
     fn to_protobuf<E: Env + 'static>(&self, args: &A) -> T;
 }
 
diff --git a/stremio-core-protobuf/src/model/fields/player.rs b/stremio-core-protobuf/src/model/fields/player.rs
index cde83bc..c6c2bb5 100644
--- a/stremio-core-protobuf/src/model/fields/player.rs
+++ b/stremio-core-protobuf/src/model/fields/player.rs
@@ -54,7 +54,7 @@ impl FromProtobuf<VideoParams> for models::player::VideoParams {
     fn from_protobuf(&self) -> VideoParams {
         VideoParams {
             hash: self.hash.to_owned(),
-            size: self.size.map(|x| x as u64).to_owned(),
+            size: self.size.to_owned(),
             filename: self.filename.to_owned(),
         }
     }
@@ -67,7 +67,7 @@ impl ToProtobuf<models::player::VideoParams, ()> for VideoParams {
     ) -> models::player::VideoParams {
         models::player::VideoParams {
             hash: self.hash.to_owned(),
-            size: self.size.map(|x| x as i64).to_owned(),
+            size: self.size.to_owned(),
             filename: self.filename.to_owned(),
         }
     }