diff --git a/Doxyfile b/Doxyfile
index 5b8b09833..eafb04d69 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = Leptonica
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.80.0
+PROJECT_NUMBER         = 1.81.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/README.html b/README.html
index 0d2be0d5a..1cf4673a1 100644
--- a/README.html
+++ b/README.html
@@ -75,12 +75,12 @@
  -  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *====================================================================*/
 
-README (version 1.80.0)
-File update: 6 Oct 2020
+README (version 1.81.0)
+File update: 6 June 2021
 ---------------------------
 
-gunzip leptonica-1.80.0.tar.gz
-tar -xvf leptonica-1.80.0.tar
+gunzip leptonica-1.81.0.tar.gz
+tar -xvf leptonica-1.81.0.tar
 
 </pre>
 
@@ -117,7 +117,7 @@ <h2> <A NAME="BUILDING">
   Libraries, executables and prototypes are easily made, as described below.
 
   When you extract from the archive, all files are put in a
-  subdirectory 'leptonica-1.80.0'.  In that directory you will
+  subdirectory 'leptonica-1.81.0'.  In that directory you will
   find a src directory containing the source files for the library,
   and a prog directory containing source files for various
   testing and example programs.
@@ -259,7 +259,7 @@ <h2> <A NAME="BUILDING">
             make install
 
        Configure also supports building in a separate directory from the
-       source.  Run "/(path-to)/leptonica-1.80.0/configure" and then "make"
+       source.  Run "/(path-to)/leptonica-1.81.0/configure" and then "make"
        from the desired build directory.
 
        Configure has a number of useful options; run "configure --help" for
@@ -1194,8 +1194,8 @@ <h2> <A NAME="CONTENTS">
    http://code.google.com/p/leptonica, as well as all versions after 1.60.
    These have now been transferred by Egor Pugin to github:
        github.com/danbloomberg/leptonica
-   where all releases (1.42 - 1.80.0) are available; e.g.,
-       https://github.com/DanBloomberg/leptonica/releases/tag/1.80.0
+   where all releases (1.42 - 1.81.0) are available; e.g.,
+       https://github.com/DanBloomberg/leptonica/releases/tag/1.81.0
    The more recent releases, from 1.74, are also available at
        leptonica.org/download.html
    Note that if you are downloading from github, the releases are more
@@ -1220,7 +1220,7 @@ <h2> <A NAME="CONTENTS">
         1.78 : 5.3.0
         1.79 : 5.4.0
         1.80 : 5.4.0
-        1.81 : 5.4.0   (not released as of 10/06/2020)
+        1.81 : 5.4.0
 
    A brief version chronology is maintained in version-notes.html.
    Starting with gcc 4.3.3, error warnings (-Werror) are given for
diff --git a/src/dnahash.c b/src/dnahash.c
index f7cf7ca6d..20a58c826 100644
--- a/src/dnahash.c
+++ b/src/dnahash.c
@@ -37,7 +37,6 @@
  *
  *    (1) The DnaHash is an array of Dna.  It is a simple method used for
  *        fast lookup of templates in the jbig2 classifier (jbclass.c).
- *    (2) The number of
  * </pre>
  */
 
diff --git a/version-notes.html b/version-notes.html
index 6430a7ebe..1a62ee171 100644
--- a/version-notes.html
+++ b/version-notes.html
@@ -77,7 +77,7 @@
 
 
 <h2 align=center>Version Notes for Leptonica</h2>
-<h3 align=center>1 Apr 2021</h3>
+<h3 align=center>6 June 2021</h3>
 
 <hr>
 <h2 align=center>  <IMG SRC="moller52.jpg" border=1 ALIGN_MIDDLE> </h2>
@@ -89,7 +89,7 @@ <h2 align=center>  <IMG SRC="moller52.jpg" border=1 ALIGN_MIDDLE> </h2>
 
 <pre>
 
-1.81.0  not yet set
+1.81.0  June 6, 2021
         * Fixed problems with tiff pdf wrapping photometry.
         * Fixed scaling issues in prog/cleanpdf for printing.
         * New progs: tiffpdftest, hashtest