diff --git a/Cargo.toml b/Cargo.toml
index 901e1b7..801fb2e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ggemini"
-version = "0.19.0"
+version = "0.20.1"
 edition = "2024"
 license = "MIT"
 readme = "README.md"
diff --git a/src/gio/file_output_stream.rs b/src/gio/file_output_stream.rs
index 777600f..2dffb5e 100644
--- a/src/gio/file_output_stream.rs
+++ b/src/gio/file_output_stream.rs
@@ -33,10 +33,10 @@ pub fn from_stream_async(
                 size.total += bytes.len();
                 on_chunk(bytes.clone(), size.total);
 
-                if let Some(limit) = size.limit {
-                    if size.total > limit {
-                        return on_complete(Err(Error::BytesTotal(size.total, limit)));
-                    }
+                if let Some(limit) = size.limit
+                    && size.total > limit
+                {
+                    return on_complete(Err(Error::BytesTotal(size.total, limit)));
                 }
 
                 if bytes.is_empty() {
diff --git a/src/gio/file_output_stream/size.rs b/src/gio/file_output_stream/size.rs
index 285d9f1..5d0c911 100644
--- a/src/gio/file_output_stream/size.rs
+++ b/src/gio/file_output_stream/size.rs
@@ -5,3 +5,13 @@ pub struct Size {
     pub limit: Option<usize>,
     pub total: usize,
 }
+
+impl Default for Size {
+    fn default() -> Self {
+        Self {
+            chunk: 0x10000, // 64KB
+            limit: None,
+            total: 0,
+        }
+    }
+}
diff --git a/src/gio/memory_input_stream/size.rs b/src/gio/memory_input_stream/size.rs
index b95ef39..9a10bd3 100644
--- a/src/gio/memory_input_stream/size.rs
+++ b/src/gio/memory_input_stream/size.rs
@@ -4,3 +4,13 @@ pub struct Size {
     pub limit: usize,
     pub total: usize,
 }
+
+impl Default for Size {
+    fn default() -> Self {
+        Self {
+            chunk: 0x10000, // 64KB
+            limit: 0xfffff, // 1 MB
+            total: 0,
+        }
+    }
+}