diff --git a/NEWS b/NEWS
index e812fd1..72b09c3 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,10 @@
 This is a brief overview of user-visible changes in adplay.
 
+Changes for version 1.8.1:
+--------------------------
+- Tie in with AdPlug 2.3.2
+- Add surround effect support for NukedOPL
+
 Changes for version 1.8:
 ------------------------
 - Tie in with AdPlug 2.3 release
diff --git a/adplay.qpg b/adplay.qpg
index 5dc3b78..0bc4acd 100644
--- a/adplay.qpg
+++ b/adplay.qpg
@@ -63,7 +63,7 @@
                <QPM:ProductDescriptionEmbedURL/>
             </QPM:ProductDescription>
             <QPM:ReleaseDescription>
-               <QPM:ReleaseVersion>1.9</QPM:ReleaseVersion>
+               <QPM:ReleaseVersion>1.8.1</QPM:ReleaseVersion>
                <QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
                <QPM:ReleaseStability>Stable</QPM:ReleaseStability>
                <QPM:ReleaseNoteMinor/>
diff --git a/configure.ac b/configure.ac
index ed024ad..852a8a9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 # Tell autoconf we're compiling a C++ program using automake and libtool.
-AC_INIT(adplay,1.9)
+AC_INIT(adplay,1.8.1)
 AC_CONFIG_SRCDIR(src/adplay.cc)
 AC_CONFIG_FILES(Makefile src/Makefile doc/Makefile)
 AC_CANONICAL_TARGET
diff --git a/doc/adplay.1 b/doc/adplay.1
index 4209bc6..056a69c 100644
--- a/doc/adplay.1
+++ b/doc/adplay.1
@@ -13,7 +13,7 @@
 .\" along with this program; see the file COPYING.  If not, write to
 .\" the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 .\"
-.TH ADPLAY 1 "November 19, 2017" "AdPlay/UNIX 1.8" "User Commands"
+.TH ADPLAY 1 "May 24, 2020" "AdPlay/UNIX 1.8.1" "User Commands"
 .SH NAME
 adplay \- AdPlay/UNIX console-based OPL2 audio player
 .SH SYNOPSIS