diff --git a/build/NuGet/Numerics.Signed/MathNet.Numerics.Signed.nuspec b/build/NuGet/Numerics.Signed/MathNet.Numerics.Signed.nuspec
index b225b9e6..69912ab2 100644
--- a/build/NuGet/Numerics.Signed/MathNet.Numerics.Signed.nuspec
+++ b/build/NuGet/Numerics.Signed/MathNet.Numerics.Signed.nuspec
@@ -13,9 +13,6 @@
     <licenseUrl>http://mathnetnumerics.codeplex.com/license</licenseUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <tags>math numeric statistics probability integration interpolation linear algebra matrix fft signed strongname</tags>
-    <dependencies>
-      <dependency id="zlib.net" version="1.0" />
-    </dependencies>
     <frameworkAssemblies>
       <frameworkAssembly assemblyName="System.Numerics" />
     </frameworkAssemblies>
diff --git a/build/NuGet/Numerics/MathNet.Numerics.nuspec b/build/NuGet/Numerics/MathNet.Numerics.nuspec
index 23175106..cdae1728 100644
--- a/build/NuGet/Numerics/MathNet.Numerics.nuspec
+++ b/build/NuGet/Numerics/MathNet.Numerics.nuspec
@@ -13,9 +13,6 @@
     <licenseUrl>http://mathnetnumerics.codeplex.com/license</licenseUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <tags>math numeric statistics probability integration interpolation linear algebra matrix fft</tags>
-    <dependencies>
-      <dependency id="zlib.net" version="1.0" />
-    </dependencies>
     <frameworkAssemblies>
       <frameworkAssembly assemblyName="System.Numerics" />
     </frameworkAssemblies>
diff --git a/packages/repositories.config b/packages/repositories.config
index 0c61614f..dc96c5df 100644
--- a/packages/repositories.config
+++ b/packages/repositories.config
@@ -2,6 +2,5 @@
 <repositories>
   <repository path="..\src\FSharpPortableUnitTests\packages.config" />
   <repository path="..\src\FSharpUnitTests\packages.config" />
-  <repository path="..\src\Numerics.IO\packages.config" />
   <repository path="..\src\UnitTests\packages.config" />
 </repositories>
\ No newline at end of file
diff --git a/packages/zlib.net.1.0.4.0/lib/zlib.net.dll b/packages/zlib.net.1.0.4.0/lib/zlib.net.dll
deleted file mode 100644
index c156f8e7..00000000
Binary files a/packages/zlib.net.1.0.4.0/lib/zlib.net.dll and /dev/null differ
diff --git a/packages/zlib.net.1.0.4.0/zlib.net.1.0.4.0.nupkg b/packages/zlib.net.1.0.4.0/zlib.net.1.0.4.0.nupkg
deleted file mode 100644
index f112185c..00000000
Binary files a/packages/zlib.net.1.0.4.0/zlib.net.1.0.4.0.nupkg and /dev/null differ
diff --git a/packages/zlib.net.1.0.4.0/zlib.net.1.0.4.0.nuspec b/packages/zlib.net.1.0.4.0/zlib.net.1.0.4.0.nuspec
deleted file mode 100644
index 713d9460..00000000
--- a/packages/zlib.net.1.0.4.0/zlib.net.1.0.4.0.nuspec
+++ /dev/null
@@ -1,16 +0,0 @@
-<?xml version="1.0"?>
-<package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
-  <metadata>
-    <id>zlib.net</id>
-    <version>1.0.4.0</version>
-    <authors>Jean-loup Gailly, Mark Adler, ComponentAce</authors>
-    <owners>Jean-loup Gailly, Mark Adler, ComponentAce</owners>
-    <licenseUrl>http://www.componentace.com/data/ZLIB_.NET/license.txt</licenseUrl>
-    <projectUrl>http://www.componentace.com/zlib_.NET.htm</projectUrl>
-    <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <description>ZLIB.NET is a 100% managed version of ZLIB compression library which implements deflate and inflate compression algorithms (zlib format).</description>
-    <summary>Managed zlib-compatible library providing deflate and inflate compression algorithms.</summary>
-    <copyright>Copyright (c) 2006, ComponentAce</copyright>
-    <tags>zip zlib deflate</tags>
-  </metadata>
-</package>
\ No newline at end of file
diff --git a/src/Numerics.IO/packages.config b/src/Numerics.IO/packages.config
deleted file mode 100644
index f7843c16..00000000
--- a/src/Numerics.IO/packages.config
+++ /dev/null
@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<packages>
-  <package id="zlib.net" version="1.0.3.0" />
-  <package id="zlib.net" version="1.0.4.0" targetFramework="net40" />
-</packages>
\ No newline at end of file
diff --git a/src/UnitTests/packages.config b/src/UnitTests/packages.config
index b18d328c..5c3ca54d 100644
--- a/src/UnitTests/packages.config
+++ b/src/UnitTests/packages.config
@@ -1,6 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="NUnit" version="2.6.2" targetFramework="net40" />
-  <package id="zlib.net" version="1.0.3.0" />
-  <package id="zlib.net" version="1.0.4.0" targetFramework="net40" />
 </packages>
\ No newline at end of file