diff --git a/RELEASE.md b/RELEASE.md
index 31ca6dc48c..b7b407f78f 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,3 +1,13 @@
+# Release 2.20.0
+
+The 2.20 minor series tracks TensorFlow 2.20.
+
+## Features
+- Compatible with Python 3.13 (see next point)
+- Added a dependency to Pillow (https://python-pillow.github.io/), to replace use of deprecated standard library `imghdr` (removed in Python 3.13) (#7009, thanks @Zamanhuseyinli)
+- Updated vendored version of `bleach` library to 6.2.0 and removed dependency on `six` library. (#7013)
+
+
 # Release 2.19.0
 
 The 2.19 minor series tracks TensorFlow 2.19.
diff --git a/tensorboard/compat/proto/config.proto b/tensorboard/compat/proto/config.proto
index f7c8ee837a..0b798c3f27 100644
--- a/tensorboard/compat/proto/config.proto
+++ b/tensorboard/compat/proto/config.proto
@@ -777,9 +777,17 @@ message ConfigProto {
     // disabled, and parallel execution is allowed.
     bool disable_eager_executor_streaming_enqueue = 26;
 
+    // If true, the function library runtime will be finalized when the session
+    // is finalized.
+    bool finalize_function_library_runtime = 33;
+
+    // If true, the resource manager will be finalized when the session
+    // is finalized.
+    bool finalize_resource_manager = 34;
+
     reserved 25;
 
-    // Next: 33
+    // Next: 35
   }
 
   Experimental experimental = 16;
diff --git a/tensorboard/compat/proto/tfprof_log.proto b/tensorboard/compat/proto/tfprof_log.proto
index 68a2b2fe8f..20ca0bf2fe 100644
--- a/tensorboard/compat/proto/tfprof_log.proto
+++ b/tensorboard/compat/proto/tfprof_log.proto
@@ -11,17 +11,12 @@ option go_package = "github.com/tensorflow/tensorflow/tensorflow/go/core/profile
 message CodeDef {
   repeated Trace traces = 1;
   message Trace {
-    string file = 1 [deprecated = true];  // deprecated by file_id.
+    reserved 1, 3, 4;
+    reserved "file", "function", "line";
     int64 file_id = 6;
-
     int32 lineno = 2;
-
-    string function = 3 [deprecated = true];  // deprecated by function_id.
     int64 function_id = 7;
-
-    string line = 4 [deprecated = true];  // deprecated line_id.
     int64 line_id = 8;
-
     int32 func_start_line = 5;
   }
 }
diff --git a/tensorboard/compat/proto/types.proto b/tensorboard/compat/proto/types.proto
index c0e131bf14..7ed62e2c7e 100644
--- a/tensorboard/compat/proto/types.proto
+++ b/tensorboard/compat/proto/types.proto
@@ -52,6 +52,8 @@ enum DataType {
 
   DT_INT4 = 29;
   DT_UINT4 = 30;
+  DT_INT2 = 31;
+  DT_UINT2 = 32;
 
   // Do not use!  These are only for TF1's obsolete reference Variables.
   // Every enum above should have a corresponding value below (verified by
@@ -87,6 +89,8 @@ enum DataType {
   DT_FLOAT8_E5M2FNUZ_REF = 128;
   DT_INT4_REF = 129;
   DT_UINT4_REF = 130;
+  DT_INT2_REF = 131;
+  DT_UINT2_REF = 132;
 }
 // DISABLED.ThenChange(
 //    https://www.tensorflow.org/code/tensorflow/c/tf_datatype.h,
diff --git a/tensorboard/data/server/descriptor.bin b/tensorboard/data/server/descriptor.bin
index 681c537d34..bd230a3947 100644
Binary files a/tensorboard/data/server/descriptor.bin and b/tensorboard/data/server/descriptor.bin differ
diff --git a/tensorboard/data/server/tensorboard.pb.rs b/tensorboard/data/server/tensorboard.pb.rs
index 0505bec9b5..43f3657918 100644
--- a/tensorboard/data/server/tensorboard.pb.rs
+++ b/tensorboard/data/server/tensorboard.pb.rs
@@ -146,6 +146,8 @@ pub enum DataType {
 
     DtInt4 = 29,
     DtUint4 = 30,
+    DtInt2 = 31,
+    DtUint2 = 32,
     /// Do not use!  These are only for TF1's obsolete reference Variables.
     /// Every enum above should have a corresponding value below (verified by
     /// types_test).
@@ -179,6 +181,8 @@ pub enum DataType {
     DtFloat8E5m2fnuzRef = 128,
     DtInt4Ref = 129,
     DtUint4Ref = 130,
+    DtInt2Ref = 131,
+    DtUint2Ref = 132,
 }
 /// Protocol buffer representing a handle to a tensorflow resource. Handles are
 /// not valid across executions, but can be serialized back and forth from within
diff --git a/tensorboard/version.py b/tensorboard/version.py
index 7be1322f75..d3dadf70bc 100644
--- a/tensorboard/version.py
+++ b/tensorboard/version.py
@@ -15,7 +15,7 @@
 
 """Contains the version string."""
 
-VERSION = "2.20.0a0"
+VERSION = "2.21.0a0"
 
 if __name__ == "__main__":
     print(VERSION)