diff --git a/phreeqc3-doc/RELEASE.TXT b/phreeqc3-doc/RELEASE.TXT
index 63267b91..d7f8de25 100644
--- a/phreeqc3-doc/RELEASE.TXT
+++ b/phreeqc3-doc/RELEASE.TXT
@@ -33,6 +33,14 @@ SETDIFF_C("CO3-2", 1.18e-9)         Sets dw for a species (see SOLUTION_SPECIES)
 SYS("element", count , name$,       Sixth argument is new and determines the sort order,
 type$ , moles, 1)                   0 sorted by 5th argument, 1, sorted by 3rd argument.
 
+	-------------
+	April 6, 2021
+	-------------
+	PHREEQC: Code was revised to make greater use of C++ template classes (vector and map) for 
+	memory management
+	
+	PhreeqcI: More comprehensive documentation of Basic functions.
+
 	-------------
 	March 10, 2021
 	-------------