diff --git a/.github/workflows/flutter-build.yml b/.github/workflows/flutter-build.yml
index 40f14e8b6..74e0f62f5 100644
--- a/.github/workflows/flutter-build.yml
+++ b/.github/workflows/flutter-build.yml
@@ -11,6 +11,7 @@ on:
         default: "nightly"
 
 env:
+  RUST_VERSION: "1.75" # https://github.com/rustdesk/rustdesk/discussions/7503
   CARGO_NDK_VERSION: "3.1.2"
   LLVM_VERSION: "15.0.6"
   FLUTTER_VERSION: "3.16.9"
@@ -93,7 +94,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           targets: ${{ matrix.job.target }}
           components: ""
 
@@ -443,7 +444,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           targets: ${{ matrix.job.target }}
           components: ""
 
@@ -610,7 +611,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           targets: ${{ matrix.job.target }}
           components: ""
 
@@ -762,7 +763,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           components: ""
 
       - uses: Swatinem/rust-cache@v2
@@ -926,7 +927,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           targets: ${{ matrix.job.target }}
           components: ""
 
@@ -1135,7 +1136,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           targets: ${{ matrix.job.target }}
           components: ""
 
@@ -1327,7 +1328,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           targets: ${{ matrix.job.target }}
           components: ""
 
diff --git a/flutter/lib/common/widgets/address_book.dart b/flutter/lib/common/widgets/address_book.dart
index f46f23344..22caf8c28 100644
--- a/flutter/lib/common/widgets/address_book.dart
+++ b/flutter/lib/common/widgets/address_book.dart
@@ -80,7 +80,6 @@ class _AddressBookState extends State<AddressBook> {
               child: Container(
                 width: 200,
                 height: double.infinity,
-                padding: const EdgeInsets.all(8.0),
                 child: Column(
                   children: [
                     _buildAbDropdown(),