diff --git a/RELEASENOTES-Data.md b/RELEASENOTES-Data.md
index e1260e0c..dcb1edea 100644
--- a/RELEASENOTES-Data.md
+++ b/RELEASENOTES-Data.md
@@ -1,3 +1,6 @@
+### 3.1.1 - 2015-07-13
+* MatrixMarket: fix MatrixMarketWriter.WriteVector
+
 ### 3.1.0 - 2015-01-11
 * Text: support for missing values in delimited reader *~Marcus Cuda*
 
diff --git a/src/Data/Matlab/Properties/AssemblyInfo.cs b/src/Data/Matlab/Properties/AssemblyInfo.cs
index d40f5ab9..ddbf27c0 100644
--- a/src/Data/Matlab/Properties/AssemblyInfo.cs
+++ b/src/Data/Matlab/Properties/AssemblyInfo.cs
@@ -42,6 +42,6 @@ using System.Runtime.InteropServices;
 [assembly: ComVisible(false)]
 [assembly: Guid("1a350030-3ad3-4e15-953d-33342a371aba")]
 
-[assembly: AssemblyVersion("3.1.0.0")]
-[assembly: AssemblyFileVersion("3.1.0.0")]
-[assembly: AssemblyInformationalVersion("3.1.0")]
+[assembly: AssemblyVersion("3.1.1.0")]
+[assembly: AssemblyFileVersion("3.1.1.0")]
+[assembly: AssemblyInformationalVersion("3.1.1")]
diff --git a/src/Data/Text/Properties/AssemblyInfo.cs b/src/Data/Text/Properties/AssemblyInfo.cs
index 2fa72ee5..07f390fc 100644
--- a/src/Data/Text/Properties/AssemblyInfo.cs
+++ b/src/Data/Text/Properties/AssemblyInfo.cs
@@ -42,6 +42,6 @@ using System.Runtime.InteropServices;
 [assembly: ComVisible(false)]
 [assembly: Guid("d9f6a513-7772-4a7d-a15e-668dfcdf5b00")]
 
-[assembly: AssemblyVersion("3.1.0.0")]
-[assembly: AssemblyFileVersion("3.1.0.0")]
-[assembly: AssemblyInformationalVersion("3.1.0")]
+[assembly: AssemblyVersion("3.1.1.0")]
+[assembly: AssemblyFileVersion("3.1.1.0")]
+[assembly: AssemblyInformationalVersion("3.1.1")]
diff --git a/src/DataUnitTests/Properties/AssemblyInfo.cs b/src/DataUnitTests/Properties/AssemblyInfo.cs
index 0a1095cd..b924ec65 100644
--- a/src/DataUnitTests/Properties/AssemblyInfo.cs
+++ b/src/DataUnitTests/Properties/AssemblyInfo.cs
@@ -14,6 +14,6 @@ using System.Runtime.InteropServices;
 [assembly: ComVisible(false)]
 [assembly: Guid("bb41bee6-eb4c-48c9-8edd-7a5ae2422567")]
 
-[assembly: AssemblyVersion("3.1.0.0")]
-[assembly: AssemblyFileVersion("3.1.0.0")]
-[assembly: AssemblyInformationalVersion("3.1.0")]
+[assembly: AssemblyVersion("3.1.1.0")]
+[assembly: AssemblyFileVersion("3.1.1.0")]
+[assembly: AssemblyInformationalVersion("3.1.1")]