diff --git a/datovka-4.19.0.tar.xz b/datovka-4.19.0.tar.xz
deleted file mode 100644
index 9e867cb..0000000
--- a/datovka-4.19.0.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:14f27bb1f313ee818e1c4aaa246925b8f548918c70f351495df7c9385db27b6e
-size 2978904
diff --git a/datovka-4.19.0.tar.xz.sha256 b/datovka-4.19.0.tar.xz.sha256
deleted file mode 100644
index 1878137..0000000
--- a/datovka-4.19.0.tar.xz.sha256
+++ /dev/null
@@ -1 +0,0 @@
-14f27bb1f313ee818e1c4aaa246925b8f548918c70f351495df7c9385db27b6e
diff --git a/datovka-4.20.0.tar.xz b/datovka-4.20.0.tar.xz
new file mode 100644
index 0000000..996ee4a
--- /dev/null
+++ b/datovka-4.20.0.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:84c6e00edbd1b6fbb61126a3718842570e48e5895b97818d99b2f56f79a7a45d
+size 2992736
diff --git a/datovka-4.20.0.tar.xz.sha256 b/datovka-4.20.0.tar.xz.sha256
new file mode 100644
index 0000000..2f6a483
--- /dev/null
+++ b/datovka-4.20.0.tar.xz.sha256
@@ -0,0 +1 @@
+84c6e00edbd1b6fbb61126a3718842570e48e5895b97818d99b2f56f79a7a45d
diff --git a/datovka-fix-pro.patch b/datovka-fix-pro.patch
index 2b47748..efc57f4 100644
--- a/datovka-fix-pro.patch
+++ b/datovka-fix-pro.patch
@@ -1,12 +1,10 @@
 ---
- datovka.pro |   26 ++++++++------------------
- 1 file changed, 8 insertions(+), 18 deletions(-)
+ datovka.pro |   20 +++-----------------
+ 1 file changed, 3 insertions(+), 17 deletions(-)
 
-Index: datovka-4.13.0/datovka.pro
-===================================================================
---- datovka-4.13.0.orig/datovka.pro
-+++ datovka-4.13.0/datovka.pro
-@@ -46,7 +46,6 @@ isEmpty(UI_DIR) {
+--- a/datovka.pro
++++ b/datovka.pro
+@@ -52,7 +52,6 @@ isEmpty(UI_DIR) {
  CONFIG += object_parallel_to_source
  
  DEFINES += \
@@ -14,7 +12,7 @@ Index: datovka-4.13.0/datovka.pro
  	VERSION=\\\"$${VERSION}\\\" \
  	APP_NAME=\\\"$${APP_NAME}\\\" \
  	APP_ORG_DOMAIN=\\\"cz.nic\\\" \
-@@ -100,11 +99,6 @@ unix:!macx {
+@@ -106,11 +105,6 @@ unix:!macx {
  	localisation.files += locale/datovka_cs.qm \
  		locale/datovka_en.qm
  
@@ -26,7 +24,7 @@ Index: datovka-4.13.0/datovka.pro
  	DEFINES += DATADIR=\\\"$$DATADIR\\\" \
  		PKGDATADIR=\\\"$$PKGDATADIR\\\" \
  		LOCALE_INST_DIR="\"\\\"$${LOCALE_INST_DIR}\\\"\"" \
-@@ -122,15 +116,13 @@ unix:!macx {
+@@ -128,12 +122,11 @@ unix:!macx {
  			icon64 \
  			icon128 \
  			icon256 \
@@ -36,16 +34,12 @@ Index: datovka-4.13.0/datovka.pro
  	}
  }
  
- QMAKE_CXXFLAGS = \
--	-g -O0 -std=c++11 \
--	-Wall -Wextra -pedantic \
--	-Wdate-time -Wformat -Werror=format-security
-+	-g $$(CXXFLAGS) \
-+	-Wall -Wextra -pedantic
- 
- #INCLUDEPATH +=
- 
-@@ -251,15 +243,8 @@ macx {
+-QMAKE_CXXFLAGS = -g -O0
++QMAKE_CXXFLAGS = $$(CXXFLAGS)
+ isEqual(QT_MAJOR_VERSION, 5) {
+ 	QMAKE_CXXFLAGS += -std=c++11
+ }
+@@ -265,15 +258,8 @@ macx {
  		locale/datovka_en.qm
  	localisation.files += locale/qtbase_cs.qm
  
diff --git a/datovka.changes b/datovka.changes
index 0872b1f..0b882e5 100644
--- a/datovka.changes
+++ b/datovka.changes
@@ -1,3 +1,22 @@
+-------------------------------------------------------------------
+Tue May  3 06:54:31 UTC 2022 - Jiri Slaby <jslaby@suse.cz>
+
+- Update to 4.20.0
+ * Fixed a mistake when adding prefixes to multi-line log entries.
+ * Enhanced code for handling JSON data.
+ * Rewritten JSON classes for communication with the records management service.
+ * Able to create a short PDF attachment directly in the application. Only a
+   single file can be created whose file name is fixed.
+ * Modified communication sequence with records management server when
+   automatically uploading newly downloaded messages according to matching
+   identifiers. Upload hierarchy is queried only once.
+ * Fixed a problem when automatic upload into records management might cause
+   the application to crash.
+ * Fixed a communication problem when message automatically uploaded into
+   records management haven't been displayed in message listing as uploaded.
+ * Using c++17 compiler flag when compiling with Qt-6.
+- Update datovka-fix-pro.patch: c++17 for qt6 is fixed above
+
 -------------------------------------------------------------------
 Tue Feb  1 06:50:56 UTC 2022 - Jiri Slaby <jslaby@suse.cz>
 
diff --git a/datovka.spec b/datovka.spec
index 08a40b7..cadee3f 100644
--- a/datovka.spec
+++ b/datovka.spec
@@ -27,7 +27,7 @@
 %endif
 
 Name:           datovka
-Version:        4.19.0
+Version:        4.20.0
 Release:        0
 Summary:        Library to access Czech eGov system "Datove schranky"
 License:        GPL-3.0-or-later
@@ -82,11 +82,7 @@ sed -i \
 
 %build
 export CFLAGS="%{optflags}"
-%if 0%{qt_version} == 6
-export CXXFLAGS="-std=c++17 %{optflags}"
-%else
-export CXXFLAGS="-std=c++11 %{optflags}"
-%endif
+export CXXFLAGS="%{optflags}"
 %{lrelease} datovka.pro
 %if 0%{qt_version} == 6
 # QMAKE_LIBS_LIBATOMIC= is only temporary to fix: