diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 5900a531b..cb90793e0 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -74,7 +74,9 @@ jobs:
     steps:
       - name: Install libgdi+, which is required for tests running on ubuntu
         if: ${{ contains(matrix.options.os, 'ubuntu') }}
-        run: sudo apt-get -y install libgdiplus libgif-dev libglib2.0-dev libcairo2-dev libtiff-dev libexif-dev
+        run: |
+            sudo apt-get update
+            sudo apt-get -y install libgdiplus libgif-dev libglib2.0-dev libcairo2-dev libtiff-dev libexif-dev
 
       - name: Git Config
         shell: bash
diff --git a/.github/workflows/code-coverage.yml b/.github/workflows/code-coverage.yml
index 30cb9d0f5..b4965795c 100644
--- a/.github/workflows/code-coverage.yml
+++ b/.github/workflows/code-coverage.yml
@@ -20,7 +20,9 @@ jobs:
 
       - name: Install libgdi+, which is required for tests running on ubuntu
         if: ${{ contains(matrix.options.os, 'ubuntu') }}
-        run: sudo apt-get -y install libgdiplus libgif-dev libglib2.0-dev libcairo2-dev libtiff-dev libexif-dev
+        run: |
+            sudo apt-get update
+            sudo apt-get -y install libgdiplus libgif-dev libglib2.0-dev libcairo2-dev libtiff-dev libexif-dev
 
       - name: Git Config
         shell: bash
diff --git a/src/ImageSharp/Formats/Webp/BitWriter/Vp8BitWriter.cs b/src/ImageSharp/Formats/Webp/BitWriter/Vp8BitWriter.cs
index 81530706d..505f54312 100644
--- a/src/ImageSharp/Formats/Webp/BitWriter/Vp8BitWriter.cs
+++ b/src/ImageSharp/Formats/Webp/BitWriter/Vp8BitWriter.cs
@@ -604,7 +604,7 @@ internal class Vp8BitWriter : BitWriterBase
         uint profile = 0;
         int width = this.enc.Width;
         int height = this.enc.Height;
-        byte[] vp8FrameHeader = new byte[WebpConstants.Vp8FrameHeaderSize];
+        Span<byte> vp8FrameHeader = stackalloc byte[WebpConstants.Vp8FrameHeaderSize];
 
         // Paragraph 9.1.
         uint bits = 0 // keyframe (1b)