diff --git a/phreeqc3-doc/RELEASE.TXT b/phreeqc3-doc/RELEASE.TXT
index d7f8de25..8887d1eb 100644
--- a/phreeqc3-doc/RELEASE.TXT
+++ b/phreeqc3-doc/RELEASE.TXT
@@ -1,4 +1,17 @@
 Version @PHREEQC_VER@: @PHREEQC_DATE@
+
+  	--------------
+	April 10, 2021
+	--------------
+	
+	PHREEQC: Fixed a catastrophic error under some conditions when a surface was used 
+	with a SIT database. Also enabled EDL calculation for SIT databases; the EDL is 
+	calculated, but the results have not been tested for correctness.
+	
+---------------------------------------------------------------------------------------------
+Version 3.7.0: April 29, 2021	
+---------------------------------------------------------------------------------------------
+
 Summary of Basic functions not include in PhreeqcI help:
 
 ADD_HEADING("NewHeading")           Append a new heading to the list of -headings defined