diff --git a/browser/config/version.txt b/browser/config/version.txt
index 6ca2c9bcecf1..ce3061dbdab6 100644
--- a/browser/config/version.txt
+++ b/browser/config/version.txt
@@ -1 +1 @@
-98.0a1
+99.0a1
diff --git a/browser/config/version_display.txt b/browser/config/version_display.txt
index 6ca2c9bcecf1..ce3061dbdab6 100644
--- a/browser/config/version_display.txt
+++ b/browser/config/version_display.txt
@@ -1 +1 @@
-98.0a1
+99.0a1
diff --git a/config/milestone.txt b/config/milestone.txt
index b5af161072c3..727bd7641c05 100644
--- a/config/milestone.txt
+++ b/config/milestone.txt
@@ -10,4 +10,4 @@
 # hardcoded milestones in the tree from these two files.
 #--------------------------------------------------------
 
-98.0a1
+99.0a1
diff --git a/services/sync/modules/constants.js b/services/sync/modules/constants.js
index 24ac92fb441d..2922b913597e 100644
--- a/services/sync/modules/constants.js
+++ b/services/sync/modules/constants.js
@@ -7,7 +7,7 @@ var EXPORTED_SYMBOLS = [];
 for (let [key, val] of Object.entries({
   // Don't manually modify this line, as it is automatically replaced on merge day
   // by the gecko_migration.py script.
-  WEAVE_VERSION: "1.100.0",
+  WEAVE_VERSION: "1.101.0",
 
   // Sync Server API version that the client supports.
   SYNC_API_VERSION: "1.5",
diff --git a/xpcom/components/Module.h b/xpcom/components/Module.h
index 501b3bd2fc64..32794c55a8e9 100644
--- a/xpcom/components/Module.h
+++ b/xpcom/components/Module.h
@@ -21,7 +21,7 @@ namespace mozilla {
  * via a module loader.
  */
 struct Module {
-  static const unsigned int kVersion = 98;
+  static const unsigned int kVersion = 99;
 
   struct CIDEntry;