diff --git a/CMakeLists.txt b/CMakeLists.txt
index f9364fdd2c..eb91866f00 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.0)
 project(SRB2
-	VERSION 2.1.19
+	VERSION 2.1.20
 	LANGUAGES C)
 
 if(${PROJECT_SOURCE_DIR} MATCHES ${PROJECT_BINARY_DIR})
diff --git a/appveyor.yml b/appveyor.yml
index ae3f82f58c..69913cfc87 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 2.1.19.{branch}-{build}
+version: 2.1.20.{branch}-{build}
 os: MinGW
 
 environment:
diff --git a/src/doomdef.h b/src/doomdef.h
index 1eca59d522..7f641558f0 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -150,9 +150,9 @@ extern FILE *logstream;
 // we use comprevision and compbranch instead.
 #else
 #define VERSION    201 // Game version
-#define SUBVERSION 19  // more precise version number
-#define VERSIONSTRING "v2.1.19"
-#define VERSIONSTRINGW L"v2.1.19"
+#define SUBVERSION 20  // more precise version number
+#define VERSIONSTRING "v2.1.20"
+#define VERSIONSTRINGW L"v2.1.20"
 // Hey! If you change this, add 1 to the MODVERSION below!
 // Otherwise we can't force updates!
 #endif
@@ -205,7 +205,7 @@ extern FILE *logstream;
 // Will always resemble the versionstring, 205 = 2.0.5, 210 = 2.1, etc.
 #define CODEBASE 210
 
-// The Modification ID; must be obtained from Inuyasha ( http://mb.srb2.org/private.php?do=newpm&u=2604 ).
+// The Modification ID; must be obtained from Rob ( https://mb.srb2.org/private.php?do=newpm&u=546 ).
 // DO NOT try to set this otherwise, or your modification will be unplayable through the Master Server.
 // "12" is the default mod ID for version 2.1
 #define MODID 12
@@ -214,7 +214,7 @@ extern FILE *logstream;
 // it's only for detection of the version the player is using so the MS can alert them of an update.
 // Only set it higher, not lower, obviously.
 // Note that we use this to help keep internal testing in check; this is why v2.1.0 is not version "1".
-#define MODVERSION 24
+#define MODVERSION 25
 
 // =========================================================================
 
diff --git a/src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj b/src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj
index 68391f99ca..eaac87debe 100644
--- a/src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj
+++ b/src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj
@@ -1214,7 +1214,7 @@
 		C01FCF4B08A954540054247B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				CURRENT_PROJECT_VERSION = 2.1.19;
+				CURRENT_PROJECT_VERSION = 2.1.20;
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"$(inherited)",
 					NORMALSRB2,
@@ -1226,7 +1226,7 @@
 		C01FCF4C08A954540054247B /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				CURRENT_PROJECT_VERSION = 2.1.19;
+				CURRENT_PROJECT_VERSION = 2.1.20;
 				GCC_ENABLE_FIX_AND_CONTINUE = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = NO;
 				GCC_PREPROCESSOR_DEFINITIONS = (
diff --git a/src/sdl12/macosx/Srb2mac.xcodeproj/project.pbxproj b/src/sdl12/macosx/Srb2mac.xcodeproj/project.pbxproj
index fada7849c2..574161c681 100644
--- a/src/sdl12/macosx/Srb2mac.xcodeproj/project.pbxproj
+++ b/src/sdl12/macosx/Srb2mac.xcodeproj/project.pbxproj
@@ -1214,7 +1214,7 @@
 		C01FCF4B08A954540054247B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				CURRENT_PROJECT_VERSION = 2.1.19;
+				CURRENT_PROJECT_VERSION = 2.1.20;
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"$(inherited)",
 					NORMALSRB2,
@@ -1226,7 +1226,7 @@
 		C01FCF4C08A954540054247B /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				CURRENT_PROJECT_VERSION = 2.1.19;
+				CURRENT_PROJECT_VERSION = 2.1.20;
 				GCC_ENABLE_FIX_AND_CONTINUE = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = NO;
 				GCC_PREPROCESSOR_DEFINITIONS = (