diff --git a/build.cmd b/build.cmd
index ef65e935b..43a28c7e4 100644
--- a/build.cmd
+++ b/build.cmd
@@ -46,9 +46,8 @@ if ERRORLEVEL 1 (
 )
 
 REM //---------- get rpclib ----------
-set RPC_VERSION=c4fb37acbe67ec99e47e5187acd2a7450bde0cec
 IF NOT EXIST external\rpclib mkdir external\rpclib
-IF NOT EXIST external\rpclib\rpclib-%RPC_VERSION% (
+IF NOT EXIST external\rpclib\rpclib-2.2.1 (
 	REM //leave some blank lines because powershell shows download banner at top of console
 	ECHO(
 	ECHO(   
@@ -57,7 +56,7 @@ IF NOT EXIST external\rpclib\rpclib-%RPC_VERSION% (
 	ECHO Downloading rpclib
 	ECHO *****************************************************************************************
 	@echo on
-	powershell -command "& { [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; iwr https://github.com/qchateau/rpclib/archive/%RPC_VERSION%.zip -OutFile external\rpclib.zip }"
+	powershell -command "& { [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; iwr https://github.com/madratman/rpclib/archive/v2.2.1.zip -OutFile external\rpclib.zip }"
 	@echo off
 	
 	REM //remove any previous versions
@@ -68,7 +67,7 @@ IF NOT EXIST external\rpclib\rpclib-%RPC_VERSION% (
 	
 	REM //Don't fail the build if the high-poly car is unable to be downloaded
 	REM //Instead, just notify users that the gokart will be used.
-	IF NOT EXIST external\rpclib\rpclib-%RPC_VERSION% (
+	IF NOT EXIST external\rpclib\rpclib-2.2.1 (
 		ECHO Unable to download high-polycount SUV. Your AirSim build will use the default vehicle.
 		goto :buildfailed
 	)
@@ -76,8 +75,8 @@ IF NOT EXIST external\rpclib\rpclib-%RPC_VERSION% (
 
 REM //---------- Build rpclib ------------
 ECHO Starting cmake to build rpclib...
-IF NOT EXIST external\rpclib\rpclib-%RPC_VERSION%\build mkdir external\rpclib\rpclib-%RPC_VERSION%\build
-cd external\rpclib\rpclib-%RPC_VERSION%\build
+IF NOT EXIST external\rpclib\rpclib-2.2.1\build mkdir external\rpclib\rpclib-2.2.1\build
+cd external\rpclib\rpclib-2.2.1\build
 REM cmake -G"Visual Studio 14 2015 Win64" ..
 cmake -G"Visual Studio 16 2019" ..
 
@@ -98,15 +97,15 @@ set RPCLIB_TARGET_LIB=AirLib\deps\rpclib\lib\x64
 if NOT exist %RPCLIB_TARGET_LIB% mkdir %RPCLIB_TARGET_LIB%
 set RPCLIB_TARGET_INCLUDE=AirLib\deps\rpclib\include
 if NOT exist %RPCLIB_TARGET_INCLUDE% mkdir %RPCLIB_TARGET_INCLUDE%
-robocopy /MIR external\rpclib\rpclib-%RPC_VERSION%\include %RPCLIB_TARGET_INCLUDE%
+robocopy /MIR external\rpclib\rpclib-2.2.1\include %RPCLIB_TARGET_INCLUDE%
 
 if "%buildMode%" == "--Debug" (
-robocopy /MIR external\rpclib\rpclib-%RPC_VERSION%\build\Debug %RPCLIB_TARGET_LIB%\Debug
+robocopy /MIR external\rpclib\rpclib-2.2.1\build\Debug %RPCLIB_TARGET_LIB%\Debug
 ) else if "%buildMode%" == "--Release" (
-robocopy /MIR external\rpclib\rpclib-%RPC_VERSION%\build\Release %RPCLIB_TARGET_LIB%\Release
+robocopy /MIR external\rpclib\rpclib-2.2.1\build\Release %RPCLIB_TARGET_LIB%\Release
 ) else (
-robocopy /MIR external\rpclib\rpclib-%RPC_VERSION%\build\Debug %RPCLIB_TARGET_LIB%\Debug
-robocopy /MIR external\rpclib\rpclib-%RPC_VERSION%\build\Release %RPCLIB_TARGET_LIB%\Release
+robocopy /MIR external\rpclib\rpclib-2.2.1\build\Debug %RPCLIB_TARGET_LIB%\Debug
+robocopy /MIR external\rpclib\rpclib-2.2.1\build\Release %RPCLIB_TARGET_LIB%\Release
 )
 
 REM //---------- get High PolyCount SUV Car Model ------------
diff --git a/build.sh b/build.sh
index c298a6c17..952b73965 100755
--- a/build.sh
+++ b/build.sh
@@ -10,8 +10,7 @@ set -x
 function version_less_than_equal_to() { test "$(printf '%s\n' "$@" | sort -V | head -n 1)" = "$1"; }
 
 # check for rpclib
-RPC_VERSION=c4fb37acbe67ec99e47e5187acd2a7450bde0cec
-if [ ! -d "./external/rpclib/rpclib-${RPC_VERSION}" ]; then
+if [ ! -d "./external/rpclib/rpclib-2.2.1" ]; then
     echo "ERROR: new version of AirSim requires newer rpclib."
     echo "please run setup.sh first and then run build.sh again."
     exit 1
@@ -79,7 +78,7 @@ cp $build_dir/output/lib/librpc.a AirLib/deps/rpclib/lib/librpc.a
 
 # Update AirLib/lib, AirLib/deps, Plugins folders with new binaries
 rsync -a --delete $build_dir/output/lib/ AirLib/lib/x64/Debug
-rsync -a --delete external/rpclib/rpclib-${RPC_VERSION}/include AirLib/deps/rpclib
+rsync -a --delete external/rpclib/rpclib-2.2.1/include AirLib/deps/rpclib
 rsync -a --delete MavLinkCom/include AirLib/deps/MavLinkCom
 rsync -a --delete AirLib Unreal/Plugins/AirSim/Source
 
diff --git a/cmake/cmake-modules/CommonSetup.cmake b/cmake/cmake-modules/CommonSetup.cmake
index a2b029d5d..ff6714576 100644
--- a/cmake/cmake-modules/CommonSetup.cmake
+++ b/cmake/cmake-modules/CommonSetup.cmake
@@ -37,7 +37,7 @@ macro(CommonSetup)
     SET(LIBRARY_OUTPUT_PATH ${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
 
     #setup include and lib for rpclib which will be referenced by other projects
-    set(RPCLIB_VERSION_FOLDER rpclib-c4fb37acbe67ec99e47e5187acd2a7450bde0cec)
+    set(RPCLIB_VERSION_FOLDER rpclib-2.2.1)
     set(RPC_LIB_INCLUDES " ${AIRSIM_ROOT}/external/rpclib/${RPCLIB_VERSION_FOLDER}/include")
     #name of .a file with lib prefix
     set(RPC_LIB rpc)
diff --git a/setup.sh b/setup.sh
index a9dccecdf..614297599 100755
--- a/setup.sh
+++ b/setup.sh
@@ -119,13 +119,12 @@ fi # End USB setup, CMake install
 
 
 # Download rpclib
-RPC_VERSION=c4fb37acbe67ec99e47e5187acd2a7450bde0cec
-if [ ! -d "external/rpclib/rpclib-${RPC_VERSION}" ]; then
+if [ ! -d "external/rpclib/rpclib-2.2.1" ]; then
     echo "*********************************************************************************************"
     echo "Downloading rpclib..."
     echo "*********************************************************************************************"
 
-    wget https://github.com/qchateau/rpclib/archive/${RPC_VERSION}.zip -O rpclib.zip
+    wget https://github.com/madratman/rpclib/archive/v2.2.1.zip
 
     # remove previous versions
     rm -rf "external/rpclib"