diff --git a/src/DocNet/App.config b/src/DocNet/App.config
index 8227adb..d0feca6 100644
--- a/src/DocNet/App.config
+++ b/src/DocNet/App.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2"/>
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/>
     </startup>
 </configuration>
diff --git a/src/DocNet/Docnet.csproj b/src/DocNet/Docnet.csproj
index c481ea9..ddf4452 100644
--- a/src/DocNet/Docnet.csproj
+++ b/src/DocNet/Docnet.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>Docnet</RootNamespace>
     <AssemblyName>Docnet</AssemblyName>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <TargetFrameworkProfile />
diff --git a/src/MarkdownDeep/MarkdownDeep.csproj b/src/MarkdownDeep/MarkdownDeep.csproj
index 79b4a2b..5835b29 100644
--- a/src/MarkdownDeep/MarkdownDeep.csproj
+++ b/src/MarkdownDeep/MarkdownDeep.csproj
@@ -10,7 +10,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>MarkdownDeep</RootNamespace>
     <AssemblyName>MarkdownDeep</AssemblyName>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <FileUpgradeFlags>
     </FileUpgradeFlags>
diff --git a/src/MarkdownDeepTests/MarkdownDeepTests.csproj b/src/MarkdownDeepTests/MarkdownDeepTests.csproj
index 015c691..bd8066b 100644
--- a/src/MarkdownDeepTests/MarkdownDeepTests.csproj
+++ b/src/MarkdownDeepTests/MarkdownDeepTests.csproj
@@ -10,7 +10,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>MarkdownDeepTests</RootNamespace>
     <AssemblyName>MarkdownDeepTests</AssemblyName>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <FileUpgradeFlags>
     </FileUpgradeFlags>
diff --git a/src/MarkdownDeepTests/app.config b/src/MarkdownDeepTests/app.config
index b477210..d0d241d 100644
--- a/src/MarkdownDeepTests/app.config
+++ b/src/MarkdownDeepTests/app.config
@@ -10,4 +10,4 @@
 			<add key="ApartmentState" value="STA"/>
 		</TestRunner>
 	</NUnit>
-<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2"/></startup></configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/></startup></configuration>