diff --git a/.gitignore b/.gitignore
index 1bb0ab1..c3dfe80 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 /java-runtime-decompiler-5.0.beta2.tar.gz
 /java-runtime-decompiler-5.0.rc1.tar.gz
 /java-runtime-decompiler-5.1.tar.gz
+/java-runtime-decompiler-6.0.0.pre.1.tar.gz
diff --git a/java-runtime-decompiler.spec b/java-runtime-decompiler.spec
index 4c9de0c..eee1535 100644
--- a/java-runtime-decompiler.spec
+++ b/java-runtime-decompiler.spec
@@ -1,6 +1,6 @@
 Summary: Application for extraction and decompilation of JVM byte code
 Name: java-runtime-decompiler
-Version: 5.1
+Version: 6.0.0.pre.1
 Release: 1%{?dist}
 License: GPLv3
 URL: https://github.com/pmikova/java-runtime-decompiler
@@ -28,7 +28,7 @@ BuildRequires: maven-surefire-provider-junit5
 BuildRequires: maven-surefire
 BuildRequires: maven-surefire-plugin
 BuildRequires: maven-clean-plugin
-BuildRequires: java-11-devel
+BuildRequires: java-devel
 BuildRequires: google-gson
 BuildRequires: desktop-file-utils
 BuildRequires: classpathless-compiler
@@ -64,8 +64,11 @@ This package contains the API documentation for %{name}.
 pushd runtime-decompiler
 %pom_remove_plugin :maven-jar-plugin
 popd
+%pom_remove_plugin :spotbugs-maven-plugin
+%pom_remove_plugin :maven-checkstyle-plugin
+%pom_remove_dep :spotbugs-annotations
 
-%mvn_build --xmvn-javadoc
+%mvn_build --xmvn-javadoc -- -Plegacy
 java -cp /usr/share/java/classpathless-compiler/classpathless-compiler.jar:runtime-decompiler/target/runtime-decompiler-%{version}.jar org.jrd.backend.data.Help > %{name}.1
 
 %install
@@ -107,6 +110,11 @@ desktop-file-install --vendor="fedora"                     \
 %license LICENSE
 
 %changelog
+* Thu Aug 12 2021 Fedora Release Engineering <releng@fedoraproject.org> - 6.0.0.pre.1-1
+- umped sources to upstream pre release
+- adapted jcoder plugin
+- todo, patch for removed plugins
+
 * Thu Aug 12 2021 Fedora Release Engineering <releng@fedoraproject.org> - 5.1-1
 - bumped to final sources
 
diff --git a/sources b/sources
index 12c4568..52a8086 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (java-runtime-decompiler-5.1.tar.gz) = 0a1e644696c7fc0595a9b4ca05ef1f392a78e5a6bb6e9631ede8a93776740ae8cf65ced0cfaacd7890985ee659e41947bcf17a87d7bc3ba5958ae84a943b64d9
+SHA512 (java-runtime-decompiler-6.0.0.pre.1.tar.gz) = a6d3525f36b2a529fe57cea03131d8b112ca17f90a31356ae8bddcc20b852b17663763baf62d88aed1778148f235c12fc923377d62c0e5fd66d6fadb79d502ce
diff --git a/systemJcoder.patch b/systemJcoder.patch
index 1454b9e..bdbacc7 100644
--- a/systemJcoder.patch
+++ b/systemJcoder.patch
@@ -6,7 +6,7 @@
 -  "WrapperURL": "file://${XDG_CONFIG_HOME}/plugins/JcoderDecompilerWrapper.java",
 +  "WrapperURL": "file:/etc/java-runtime-decompiler/plugins/JcoderDecompilerWrapper.java",
    "DependencyURL": [
--    "file://${HOME}/.m2/repository/org/openjdk/asmtools/7.0.b10-ea/asmtools-core-7.0.b10-ea.jar"
+-    "file://${HOME}/.m2/repository/org/openjdk/asmtools/asmtools-core/7.0.b10-ea/asmtools-core-7.0.b10-ea.jar"
 +    "file:/usr/share/java/openjdk-asmtools/asmtools-core.jar"
    ],
    "DecompilerDownloadURL": "https://github.com/openjdk/asmtools"