diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,3 +23,7 @@
 * Third version. Added README.md file. Removed the unneeded constraint for mean2F and related 
 functions. Since the version 0.3.0.0, the project is devoted to fondation Gastrostars.
 
+## 0.3.0.1 -- 2023-04-18
+
+* Third version revised A. Added README.md file into source tarball so that it is displayed, too.
+
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,11 @@
+Devotion
+========
+
+P.S.: the author would like to devote this project to support the Foundation GASTROSTARS.
+On the 19/04/2023 there is the founder's (that is [Emma Kok](https://emmakok.nl) namesday, 
+the memory of St. Emma of Lesum or Emma of Stiepel (also known as Hemma and Imma).
+If you would like to share some financial support, please, contact the foundation
+using the URL:
+
+[Contact Foundation GASTROSTARS](https://gastrostars.nl/hou-mij-op-de-hoogte)
+
diff --git a/quantizer.cabal b/quantizer.cabal
--- a/quantizer.cabal
+++ b/quantizer.cabal
@@ -1,5 +1,5 @@
 name:                quantizer
-version:             0.3.0.0
+version:             0.3.0.1
 synopsis:            Library to provide the behaviour similar to quantum states superposition. 
 description:         Has three modules with similar functionality. The functions provide the somewhat generalized way to round the numbers based on some data.
 homepage:            https://hackage.haskell.org/package/quantizer
@@ -10,7 +10,7 @@
 copyright:           Oleksandr Zhabenko
 category:            Math
 build-type:          Simple
-extra-source-files:  CHANGELOG.md
+extra-source-files:  CHANGELOG.md, README.md
 cabal-version:       >=1.10
 
 library