diff --git a/gsoap-2.8.82.tar.xz b/gsoap-2.8.82.tar.xz
deleted file mode 100644
index d862417..0000000
--- a/gsoap-2.8.82.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b3a1922c8f538b3654503332123400121b2f2f5223d96b1373909ee1731bae5d
-size 16834884
diff --git a/gsoap-2.8.83.tar.xz b/gsoap-2.8.83.tar.xz
new file mode 100644
index 0000000..1b6321c
--- /dev/null
+++ b/gsoap-2.8.83.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1b5bdee27b21c569eac809a66fcf27e0b5795286c59e2589ba4ef8e7a35c5f6e
+size 16127520
diff --git a/gsoap.changes b/gsoap.changes
index 040998d..ce99fff 100644
--- a/gsoap.changes
+++ b/gsoap.changes
@@ -1,3 +1,23 @@
+-------------------------------------------------------------------
+Tue Apr 23 10:09:12 UTC 2019 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to new upstream release 2.8.83
+  * Added wsdl2h optimization options `-Ow2`, `-Ow3`, and `-Ow4`
+    to optimize the generated source code by schema slicing,
+    while retaining all derived extensions of base types.
+  * Added wsdl2h option `-Q` to make `xsd__anySimpleType` equal
+    to `xsd__anyType` to use as the base type for derived types,
+    so that elements of type `xsd:anySimpleType` can be
+    serialized with a derived type, using inheritance in C++ and
+    by using simulated inheritance in C using wsdl2h option `-F`.
+  * Updated wsdl2h options `-p` and `-F` to generate additional
+    wrappers for primitive types that aren't XSD primitive types,
+    such as `SOAP-ENC:base64`.
+  * Improved wsdl2h output for the infrequently-used
+    `SOAP-ENC:Array` type.
+  * Fixed an issue with soapcpp2 option `-A` that resulted in
+    error 13 `SOAP_NO_METHOD`.
+
 -------------------------------------------------------------------
 Fri Mar 15 09:37:32 UTC 2019 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/gsoap.spec b/gsoap.spec
index 35ff0ef..5680a95 100644
--- a/gsoap.spec
+++ b/gsoap.spec
@@ -17,8 +17,8 @@
 
 
 Name:           gsoap
-%define lname	libgsoap-2_8_82
-Version:        2.8.82
+%define lname	libgsoap-2_8_83
+Version:        2.8.83
 Release:        0
 Summary:        Toolkit for SOAP/REST-based C/C++ server and client web service applications
 License:        SUSE-GPL-2.0+-with-openssl-exception
@@ -94,6 +94,8 @@ perl -i -lpe 's{AC_INIT\(gsoap, 2.8\)}{AC_INIT([gsoap], [%version])}' \
 # Rebuild configure - fix that utterly long mktime test.
 # Also needed because Makefile.am and configure.ac are touched.
 autoreconf -fi
+export CXXFLAGS="-O0 -ggdb3 %optflags"
+export CFLAGS="-O0 -ggdb3 %optflags"
 %configure --enable-ipv6 --disable-static
 pushd gsoap/src/
 # build prerequisites for parallel build first
diff --git a/sanitize_source.sh b/sanitize_source.sh
index efe3059..ba64895 100644
--- a/sanitize_source.sh
+++ b/sanitize_source.sh
@@ -13,7 +13,7 @@ if ! which hardlink >/dev/null; then
 	exit 1;
 fi;
 
-version="2.8.82"
+version="2.8.83"
 shortver="2.8" # agh...
 if [ ! -e "gsoap_$version.zip" ]; then
 	wget -c "http://downloads.sf.net/gsoap2/gsoap_$version.zip"