diff --git a/arduino-core/src/processing/app/BaseNoGui.java b/arduino-core/src/processing/app/BaseNoGui.java
index b5895c706..ea51e376e 100644
--- a/arduino-core/src/processing/app/BaseNoGui.java
+++ b/arduino-core/src/processing/app/BaseNoGui.java
@@ -41,9 +41,9 @@ import static processing.app.helpers.filefilters.OnlyDirs.ONLY_DIRS;
 public class BaseNoGui {
 
   /** Version string to be used for build */
-  public static final int REVISION = 10819;
+  public static final int REVISION = 10820;
   /** Extended version string displayed on GUI */
-  public static final String VERSION_NAME = "1.8.19";
+  public static final String VERSION_NAME = "1.8.20";
   public static final String VERSION_NAME_LONG;
 
   // Current directory to use for relative paths specified on the
diff --git a/build/shared/revisions.txt b/build/shared/revisions.txt
index 9b5df895c..72807d6a7 100644
--- a/build/shared/revisions.txt
+++ b/build/shared/revisions.txt
@@ -1,3 +1,6 @@
+ARDUINO 1.8.20 not yet released
+
+
 ARDUINO 1.8.19 2021.12.20 SECURITY HOTFIX RELEASE
 
 [ide]