diff --git a/NEWS b/NEWS
index 5d999ac1a..eaba16e00 100644
--- a/NEWS
+++ b/NEWS
@@ -12,6 +12,56 @@
 Copyright 2001 - 2021 by Joe Taylor, K1JT.
 
 
+	        Release: WSJT-X 2.4.0-rc2
+	               Mar 6, 2021
+	        -------------------------
+
+WSJT-X 2.4.0 Release  Candidate 2 adds new Q65  mode functionality and
+decoder  optimizations, as  well  as repairs  defects and  regressions
+discovered in the RC1 release.
+
+ - Q65 sample .WAV files added.
+
+ - Repair a defect that caused the  WSJT-X to crash when launched from
+   an icon on macOS.
+   
+ - Repair an application crash when using the JT4 mode.
+
+ - Sequencing  improvements  to  avoid  the sent  signal  report  from
+   updating once it has been sent once in a QSO.
+
+ - UI translation updates, tnx to Sze-to, VR2UPU, and Michael, 5P1KZX.
+
+ - Enable the "Call 1st" option for Q65.
+
+ - Much improved Q65 message averaging that linearly averages the last
+   4  periods  then exponentially  reduces  the  contributions of  the
+   remainder.
+
+ - Improved macOS post install instructions, tnx to John,G4KLA.
+
+ - Enhanced Q65  simulator that  generates file names  compatible with
+   message averaging, tnx Charlie, G3WDG.
+
+ - Q65  simulator option  to generate  single tone  waveforms, tnx  to
+   Charlie, G3WDG.
+
+ - Better suppression of birdies in the Q65 decoder.
+
+ - Blank Q65 decode messages removed.
+ 
+ - Automatic low Tx  audio offset for the widest Q65  modes to keep Tx
+   signal in transmitter passband, tnx to Charlie, G3WDG.
+
+ - Much improved SNR estimates for Q65 mode.
+
+ - Decode depth is always "Fast" for Q65 mode.
+
+ - Save decoded .WAV files enabled for Q65 mode.
+
+ - ISCAT mode removed.
+
+
 		   Release: WSJT-X 2.3.1
 		         Mar 8, 2021
 		   ---------------------
diff --git a/Release_Notes.txt b/Release_Notes.txt
index a45e17276..7b1bb88c3 100644
--- a/Release_Notes.txt
+++ b/Release_Notes.txt
@@ -12,6 +12,56 @@
 Copyright 2001 - 2021 by Joe Taylor, K1JT.
 
 
+	        Release: WSJT-X 2.4.0-rc2
+	               Mar 6, 2021
+	        -------------------------
+
+WSJT-X 2.4.0 Release  Candidate 2 adds new Q65  mode functionality and
+decoder  optimizations, as  well  as repairs  defects and  regressions
+discovered in the RC1 release.
+
+ - Q65 sample .WAV files added.
+
+ - Repair a defect that caused the  WSJT-X to crash when launched from
+   an icon on macOS.
+   
+ - Repair an application crash when using the JT4 mode.
+
+ - Sequencing  improvements  to  avoid  the sent  signal  report  from
+   updating once it has been sent once in a QSO.
+
+ - UI translation updates, tnx to Sze-to, VR2UPU, and Michael, 5P1KZX.
+
+ - Enable the "Call 1st" option for Q65.
+
+ - Much improved Q65 message averaging that linearly averages the last
+   4  periods  then exponentially  reduces  the  contributions of  the
+   remainder.
+
+ - Improved macOS post install instructions, tnx to John,G4KLA.
+
+ - Enhanced Q65  simulator that  generates file names  compatible with
+   message averaging, tnx Charlie, G3WDG.
+
+ - Q65  simulator option  to generate  single tone  waveforms, tnx  to
+   Charlie, G3WDG.
+
+ - Better suppression of birdies in the Q65 decoder.
+
+ - Blank Q65 decode messages removed.
+ 
+ - Automatic low Tx  audio offset for the widest Q65  modes to keep Tx
+   signal in transmitter passband, tnx to Charlie, G3WDG.
+
+ - Much improved SNR estimates for Q65 mode.
+
+ - Decode depth is always "Fast" for Q65 mode.
+
+ - Save decoded .WAV files enabled for Q65 mode.
+
+ - ISCAT mode removed.
+
+
 		   Release: WSJT-X 2.3.1
 		         Mar 8, 2021
 		   ---------------------