diff --git a/gradle.properties b/gradle.properties
index c84789c..5d2f4ec 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 group = org.xbib
 name = net
-version = 4.0.0
+version = 4.0.1
 
 org.gradle.warning.mode = ALL
diff --git a/net-path/src/main/java/org/xbib/net/path/PathDecoder.java b/net-path/src/main/java/org/xbib/net/path/PathDecoder.java
index 89dc5ac..c0c09b3 100644
--- a/net-path/src/main/java/org/xbib/net/path/PathDecoder.java
+++ b/net-path/src/main/java/org/xbib/net/path/PathDecoder.java
@@ -4,34 +4,39 @@ import org.xbib.net.Parameter;
 import org.xbib.net.ParameterBuilder;
 import org.xbib.net.PathNormalizer;
 
+import java.nio.charset.Charset;
+
 public class PathDecoder {
 
     private final String path;
 
     private final String query;
 
+    private final Charset charset;
+
     private final ParameterBuilder params;
 
-    public PathDecoder(String pathAndQuery) {
-        this(pathAndQuery, null);
+    public PathDecoder(String pathAndQuery, Charset charset) {
+        this(pathAndQuery, null, charset);
     }
 
-    public PathDecoder(String pathAndQuery, String queryString) {
+    public PathDecoder(String pathAndQuery, String queryString, Charset charset) {
+        this.charset = charset;
         int pos = pathAndQuery.indexOf('?');
         String path = pos > 0 ? pathAndQuery.substring(0, pos) : pathAndQuery;
         this.query = pos > 0 ? pathAndQuery.substring(pos + 1) : null;
         this.path = PathNormalizer.normalize(path);
         this.params = Parameter.builder().domain(Parameter.Domain.PATH).enablePercentDecoding();
         if (query != null) {
-            this.params.add(query);
+            this.params.add(query, charset);
         }
         if (queryString != null) {
-            this.params.add(queryString);
+            this.params.add(queryString, charset);
         }
     }
 
     public void parse(String queryString) {
-        this.params.add(queryString);
+        this.params.add(queryString, charset);
     }
 
     public String path() {
diff --git a/net-path/src/test/java/org/xbib/net/path/PathDecoderTest.java b/net-path/src/test/java/org/xbib/net/path/PathDecoderTest.java
index 0a5bb54..0620b17 100644
--- a/net-path/src/test/java/org/xbib/net/path/PathDecoderTest.java
+++ b/net-path/src/test/java/org/xbib/net/path/PathDecoderTest.java
@@ -4,6 +4,8 @@ import org.junit.jupiter.api.Test;
 import org.xbib.net.Parameter;
 import org.xbib.net.URL;
 
+import java.nio.charset.StandardCharsets;
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNull;
 
@@ -11,27 +13,27 @@ class PathDecoderTest {
 
     @Test
     void testPlusSign() throws Exception {
-        PathDecoder decoder = new PathDecoder("/path?a=b+c", "d=e+f");
+        PathDecoder decoder = new PathDecoder("/path?a=b+c", "d=e+f", StandardCharsets.UTF_8);
         assertEquals("[b c]", decoder.getParameter().getAll("a", Parameter.Domain.PATH).toString());
         assertEquals("[e f]", decoder.getParameter().getAll("d", Parameter.Domain.PATH).toString());
     }
 
     @Test
     void testSlash() throws Exception {
-        PathDecoder decoder = new PathDecoder("path/foo/bar/?a=b+c", "d=e+f");
+        PathDecoder decoder = new PathDecoder("path/foo/bar/?a=b+c", "d=e+f", StandardCharsets.UTF_8);
         assertEquals("[b c]", decoder.getParameter().getAll("a", Parameter.Domain.PATH).toString());
         assertEquals("[e f]", decoder.getParameter().getAll("d", Parameter.Domain.PATH).toString());
     }
 
     @Test
     void testDoubleSlashes() {
-        PathDecoder decoder = new PathDecoder("//path", "");
+        PathDecoder decoder = new PathDecoder("//path", "", StandardCharsets.UTF_8);
         assertEquals("/path", decoder.path());
     }
 
     @Test
     void testSlashes() throws Exception {
-        PathDecoder decoder = new PathDecoder("//path?a=b+c", "d=e+f");
+        PathDecoder decoder = new PathDecoder("//path?a=b+c", "d=e+f", StandardCharsets.UTF_8);
         assertEquals("/path", decoder.path());
         assertEquals("[b c]", decoder.getParameter().getAll("a", Parameter.Domain.PATH).toString());
         assertEquals("[e f]", decoder.getParameter().getAll("d", Parameter.Domain.PATH).toString());
@@ -39,7 +41,7 @@ class PathDecoderTest {
 
     @Test
     void testPlusPercent() throws Exception {
-        PathDecoder decoder = new PathDecoder("//path?a=b%2Bc", "d=e%2Bf");
+        PathDecoder decoder = new PathDecoder("//path?a=b%2Bc", "d=e%2Bf", StandardCharsets.UTF_8);
         assertEquals("/path", decoder.path());
         assertEquals("[b+c]", decoder.getParameter().getAll("a", Parameter.Domain.PATH).toString());
         assertEquals("[e+f]", decoder.getParameter().getAll("d", Parameter.Domain.PATH).toString());
@@ -53,7 +55,7 @@ class PathDecoderTest {
         assertNull(url.getPort());
         assertEquals("/pdfconverter/index.gtpl", url.getPath());
         assertNull(url.getFragment());
-        PathDecoder decoder = new PathDecoder(requestURI);
+        PathDecoder decoder = new PathDecoder(requestURI, StandardCharsets.UTF_8);
         if (url.getQuery() != null) {
             decoder.parse(url.getDecodedQuery());
         }
diff --git a/net/src/main/java/org/xbib/net/Parameter.java b/net/src/main/java/org/xbib/net/Parameter.java
index ba97385..a53887f 100644
--- a/net/src/main/java/org/xbib/net/Parameter.java
+++ b/net/src/main/java/org/xbib/net/Parameter.java
@@ -1,5 +1,7 @@
 package org.xbib.net;
 
+import java.nio.charset.MalformedInputException;
+import java.nio.charset.UnmappableCharacterException;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
@@ -102,9 +104,17 @@ public class Parameter implements Iterable<Pair<String, Object>>, Comparable<Par
             } else {
                 object = null;
             }
-            return object != null ? object.toString() : null;
+            return object != null ? decodeIfQueryDomain(domain, object.toString()) : null;
+        }
+        return object != null ? decodeIfQueryDomain(domain, object instanceof String ? (String) object : object.toString()) : null;
+    }
+
+    private String decodeIfQueryDomain(Domain domain, String string) throws ParameterException {
+        try {
+            return Domain.QUERY == domain ? builder().percentDecode(string) : string;
+        } catch (UnmappableCharacterException | MalformedInputException e) {
+            throw new ParameterException(e);
         }
-        return object != null ? object instanceof String ? (String) object : object.toString() : null;
     }
 
     @SuppressWarnings("unchecked")
diff --git a/net/src/main/java/org/xbib/net/ParameterBuilder.java b/net/src/main/java/org/xbib/net/ParameterBuilder.java
index 8fea99a..26129db 100644
--- a/net/src/main/java/org/xbib/net/ParameterBuilder.java
+++ b/net/src/main/java/org/xbib/net/ParameterBuilder.java
@@ -14,6 +14,8 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Objects;
+
 import org.xbib.datastructures.common.ImmutableList;
 import org.xbib.datastructures.common.MultiMap;
 import org.xbib.datastructures.common.Pair;
@@ -107,11 +109,25 @@ public class ParameterBuilder implements PairValidator {
         return this;
     }
 
+    public String percentEncode(CharSequence text) throws UnmappableCharacterException, MalformedInputException {
+        if (percentEncoder == null) {
+            charset(StandardCharsets.UTF_8);
+        }
+        return percentEncoder.encode(text);
+    }
+
     public ParameterBuilder percentDecode(PercentDecoder percentDecoder) {
         this.percentDecoder = percentDecoder;
         return this;
     }
 
+    public String percentDecode(CharSequence text) throws UnmappableCharacterException, MalformedInputException {
+        if (percentDecoder == null) {
+            charset(StandardCharsets.UTF_8);
+        }
+        return percentDecoder.decode(text);
+    }
+
     public ParameterBuilder enablePercentEncoding() {
         this.enablePercentEncoding = true;
         charset(StandardCharsets.UTF_8);
@@ -222,7 +238,11 @@ public class ParameterBuilder implements PairValidator {
         return this;
     }
 
-    public ParameterBuilder add(String percentEncodedQueryString) {
+    public ParameterBuilder add(String percentEncodedQueryString, Charset charset) {
+        Objects.requireNonNull(charset);
+        if (this.charset == null || !this.charset.equals(charset)) {
+            charset(charset);
+        }
         try {
             decodeQueryString(percentEncodedQueryString);
         } catch (MalformedInputException | UnmappableCharacterException e) {
@@ -235,6 +255,9 @@ public class ParameterBuilder implements PairValidator {
         if (enableSort) {
             list.sort(Comparator.comparing(Pair::getKey));
         }
+        if (percentDecoder == null) {
+            charset(StandardCharsets.UTF_8);
+        }
         String queryString = null;
         if (enableQueryString) {
             try {
diff --git a/net/src/main/java/org/xbib/net/ParameterException.java b/net/src/main/java/org/xbib/net/ParameterException.java
index f40008d..0f09c16 100644
--- a/net/src/main/java/org/xbib/net/ParameterException.java
+++ b/net/src/main/java/org/xbib/net/ParameterException.java
@@ -3,6 +3,10 @@ package org.xbib.net;
 @SuppressWarnings("serial")
 public class ParameterException extends Exception {
 
+    public ParameterException(Exception e) {
+        super(e);
+    }
+
     public ParameterException(String message) {
         super(message);
     }
diff --git a/net/src/test/java/org/xbib/net/ParameterTest.java b/net/src/test/java/org/xbib/net/ParameterTest.java
index 4e959b0..4b1affe 100644
--- a/net/src/test/java/org/xbib/net/ParameterTest.java
+++ b/net/src/test/java/org/xbib/net/ParameterTest.java
@@ -77,6 +77,17 @@ public class ParameterTest {
                 parameter.getAsQueryString());
     }
 
+    @Test
+    public void testQueryParameterDecoding() throws ParameterException {
+        Parameter parameter = Parameter.builder()
+                .domain(Parameter.Domain.QUERY)
+                .add("value1", "Hello%20J%C3%B6rg") // query parameter, no query string mode
+                .add("value2=Hello%20J%C3%B6rg", StandardCharsets.UTF_8) // query string mode
+                .build();
+        assertEquals("Hello Jörg", parameter.getAsString("value1", Parameter.Domain.QUERY));
+        assertEquals("Hello Jörg", parameter.getAsString("value2", Parameter.Domain.QUERY));
+    }
+
     @Test
     public void testParameters() {
         Map<String, Object> map = Map.of(
diff --git a/net/src/test/java/org/xbib/net/PercentDecoderTest.java b/net/src/test/java/org/xbib/net/PercentDecoderTest.java
index a91c2d5..38cfd0c 100644
--- a/net/src/test/java/org/xbib/net/PercentDecoderTest.java
+++ b/net/src/test/java/org/xbib/net/PercentDecoderTest.java
@@ -56,6 +56,11 @@ class PercentDecoderTest {
         });
     }
 
+    @Test
+    void testJoerg() throws UnmappableCharacterException, MalformedInputException {
+        assertEquals("Hello Jörg", decoder.decode("Hello%20J%C3%B6rg"));
+    }
+
     @Test
     void testRandomStrings() throws MalformedInputException, UnmappableCharacterException {
         PercentEncoder encoder = PercentEncoders.getQueryEncoder(StandardCharsets.UTF_8);
diff --git a/net/src/test/java/org/xbib/net/URLParserTest.java b/net/src/test/java/org/xbib/net/URLParserTest.java
index fc4b6b3..bbc9d7a 100644
--- a/net/src/test/java/org/xbib/net/URLParserTest.java
+++ b/net/src/test/java/org/xbib/net/URLParserTest.java
@@ -3,6 +3,7 @@ package org.xbib.net;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import java.net.URI;
 import java.nio.charset.Charset;
 import java.nio.charset.CodingErrorAction;
 import java.nio.charset.StandardCharsets;
@@ -498,7 +499,7 @@ class URLParserTest {
     private void assertUrlCompatibility(String url) throws Exception {
         String s = URL.from(url).toExternalForm();
         assertEquals(s, URL.from(s).toExternalForm());
-        assertEquals(s, new java.net.URL(url).toExternalForm());
+        assertEquals(s, URI.create(url).toURL().toExternalForm());
     }
 
     private void assertRoundTrip(String url) {