diff --git a/cpp/iedriver/IEDriver.rc b/cpp/iedriver/IEDriver.rc
index f324fa337484e..69c1194d2135f 100644
--- a/cpp/iedriver/IEDriver.rc
+++ b/cpp/iedriver/IEDriver.rc
@@ -50,8 +50,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 3,150,1,0
- PRODUCTVERSION 3,150,1,0
+ FILEVERSION 3,150,1,1
+ PRODUCTVERSION 3,150,1,1
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -68,12 +68,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "Software Freedom Conservancy"
             VALUE "FileDescription", "Driver library for the IE driver"
-            VALUE "FileVersion", "3.150.1.0"
+            VALUE "FileVersion", "3.150.1.1"
             VALUE "InternalName", "IEDriver.dll"
             VALUE "LegalCopyright", "Copyright (C) 2019"
             VALUE "OriginalFilename", "IEDriver.dll"
             VALUE "ProductName", "Selenium WebDriver"
-            VALUE "ProductVersion", "3.150.1.0"
+            VALUE "ProductVersion", "3.150.1.1"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/cpp/iedriverserver/CHANGELOG b/cpp/iedriverserver/CHANGELOG
index 8b90f263759da..e2687c27953eb 100644
--- a/cpp/iedriverserver/CHANGELOG
+++ b/cpp/iedriverserver/CHANGELOG
@@ -9,6 +9,13 @@ available via the project downloads page. Changes in "revision" field indicate
 private releases checked into the prebuilts directory of the source tree, but
 not made generally available on the downloads page.
 
+v3.150.1.0
+==========
+ * Made checking of the Content-Length header case-insensitive. This fixes
+   a number of issues where sessions cannot be started or where commands
+   fail because the HTTP client made a choice to not use properly-cased
+   header names.
+
 v3.150.1.0
 ==========
  * Reverted change to use effective style for determining element visibility.
diff --git a/cpp/iedriverserver/IEDriverServer.rc b/cpp/iedriverserver/IEDriverServer.rc
index a22fe41a83dba..e9bf101db8316 100644
--- a/cpp/iedriverserver/IEDriverServer.rc
+++ b/cpp/iedriverserver/IEDriverServer.rc
@@ -50,8 +50,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 3,150,1,0
- PRODUCTVERSION 3,150,1,0
+ FILEVERSION 3,150,1,1
+ PRODUCTVERSION 3,150,1,1
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -68,12 +68,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "Software Freedom Conservancy"
             VALUE "FileDescription", "Command line server for the IE driver"
-            VALUE "FileVersion", "3.150.1.0"
+            VALUE "FileVersion", "3.150.1.1"
             VALUE "InternalName", "IEDriverServer.exe"
             VALUE "LegalCopyright", "Copyright (C) 2019"
             VALUE "OriginalFilename", "IEDriverServer.exe"
             VALUE "ProductName", "Selenium WebDriver"
-            VALUE "ProductVersion", "3.150.1.0"
+            VALUE "ProductVersion", "3.150.1.1"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/cpp/prebuilt/Win32/Release/IEDriverServer.exe b/cpp/prebuilt/Win32/Release/IEDriverServer.exe
index ef2c477417a84..4a24de2b655b5 100644
Binary files a/cpp/prebuilt/Win32/Release/IEDriverServer.exe and b/cpp/prebuilt/Win32/Release/IEDriverServer.exe differ
diff --git a/cpp/prebuilt/x64/Release/IEDriverServer.exe b/cpp/prebuilt/x64/Release/IEDriverServer.exe
index d5d6adace98b4..3380a3010a169 100644
Binary files a/cpp/prebuilt/x64/Release/IEDriverServer.exe and b/cpp/prebuilt/x64/Release/IEDriverServer.exe differ