diff --git a/CodeJam.Main/IO/StreamExtensions.cs b/CodeJam.Main/IO/StreamExtensions.cs
index 6b62e3cf8..95e185ff3 100644
--- a/CodeJam.Main/IO/StreamExtensions.cs
+++ b/CodeJam.Main/IO/StreamExtensions.cs
@@ -1,4 +1,5 @@
-#if NET45_OR_GREATER || TARGETS_NETSTANDARD || TARGETS_NETCOREAPP // PUBLIC_API_CHANGES
+
+#if NET45_OR_GREATER || TARGETS_NETSTANDARD || TARGETS_NETCOREAPP // PUBLIC_API_CHANGES
 using System;
 using System.IO;
 using System.Text;
@@ -83,9 +84,7 @@ public static string ReadAsString([NotNull] this Stream stream, [CanBeNull] Enco
 		{
 			// DO NOT dispose the reader
 			using (var reader = stream.ToStreamReader(encoding, true))
-			{
 				return reader.ReadToEnd();
-			}
 		}
 
 		/// <summary>
@@ -100,9 +99,7 @@ public static async Task<string> ReadAsStringAsync(
 		{
 			// DO NOT dispose the reader
 			using (var reader = stream.ToStreamReader(encoding, true))
-			{
 				return await reader.ReadToEndAsync().ConfigureAwait(false);
-			}
 		}
 
 		/// <summary>
@@ -112,13 +109,20 @@ public static async Task<string> ReadAsStringAsync(
 		[NotNull]
 		public static byte[] ReadAsByteArray([NotNull] this Stream stream)
 		{
-			// DO NOT dispose the reader
-			using (var reader = stream.ToBinaryReader(null, true))
+			if (stream.CanSeek)
+				// DO NOT dispose underlying stream
+				using (var reader = stream.ToBinaryReader(null, true))
+				{
+					var readCount = checked((int)(stream.Length - stream.Position));
+					return reader.ReadBytes(readCount);
+				}
+			using (var tempStream = new MemoryStream())
 			{
-				var readCount = checked((int)(stream.Length - stream.Position));
-				return reader.ReadBytes(readCount);
+				stream.CopyTo(tempStream);
+				return tempStream.ToArray();
 			}
 		}
 	}
 }
-#endif
+
+#endif
\ No newline at end of file
diff --git a/CodeJam.Main/Readme.txt b/CodeJam.Main/Readme.txt
index baa70d667..31c7ff430 100644
--- a/CodeJam.Main/Readme.txt
+++ b/CodeJam.Main/Readme.txt
@@ -1,6 +1,10 @@
-CodeJam 3.3.0 Release Notes
+CodeJam 3.3.1 Release Notes
 ---------------------------
 
+What's new in 3.3.1
+-------------------
+	* Fix StreamExtensions.ReadAsByteArray (non-seekable stream support)
+
 What's new in 3.3.0
 -------------------
 * Add more string Invariant and Ordinal methods.