diff --git a/src/SharpCompress/SharpCompress.csproj b/src/SharpCompress/SharpCompress.csproj
index 9dc1ee19..c40cec46 100644
--- a/src/SharpCompress/SharpCompress.csproj
+++ b/src/SharpCompress/SharpCompress.csproj
@@ -2,9 +2,9 @@
   <PropertyGroup>
     <AssemblyTitle>SharpCompress - Pure C# Decompression/Compression</AssemblyTitle>
     <NeutralLanguage>en-US</NeutralLanguage>
-    <VersionPrefix>0.30.1</VersionPrefix>
-    <AssemblyVersion>0.30.1</AssemblyVersion>
-    <FileVersion>0.30.1</FileVersion>
+    <VersionPrefix>0.31.0</VersionPrefix>
+    <AssemblyVersion>0.31.0</AssemblyVersion>
+    <FileVersion>0.31.0</FileVersion>
     <Authors>Adam Hathcock</Authors>
     <TargetFrameworks>net461;netstandard2.0;netstandard2.1;netcoreapp3.1;net5.0</TargetFrameworks>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/tests/SharpCompress.Test/Streams/ZlibBaseStreamTests.cs b/tests/SharpCompress.Test/Streams/ZlibBaseStreamTests.cs
index dd8f8943..c8d55283 100644
--- a/tests/SharpCompress.Test/Streams/ZlibBaseStreamTests.cs
+++ b/tests/SharpCompress.Test/Streams/ZlibBaseStreamTests.cs
@@ -61,7 +61,7 @@ public void Zlib_should_read_the_previously_written_message()
             }
         }
 
-        public void Compress(Stream input, Stream output, int compressionLevel)
+        private void Compress(Stream input, Stream output, int compressionLevel)
         {
             using (var zlibStream = new ZlibStream(new NonDisposingStream(output), CompressionMode.Compress, (CompressionLevel)compressionLevel))
             {
@@ -70,7 +70,7 @@ public void Compress(Stream input, Stream output, int compressionLevel)
             }
         }
 
-        public void Decompress(Stream input, Stream output)
+        private void Decompress(Stream input, Stream output)
         {
             using (var zlibStream = new ZlibStream(new NonDisposingStream(input), CompressionMode.Decompress))
             {