diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2e19783466..b272d07866 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -31,7 +31,7 @@ and the minimal reproducer project to Tycho's [issue tracker](https://github.com
 
 ### Prerequisites
 
-Java 11 and Maven 3.6.3, or newer.
+Java 17 and Maven 3.9.0, or newer.
 
 If your Internet connection uses a proxy, make sure that you have the proxy configured in your [Maven settings.xml](https://maven.apache.org/settings.html).
 
diff --git a/tycho-api/src/main/java/org/eclipse/tycho/TychoConstants.java b/tycho-api/src/main/java/org/eclipse/tycho/TychoConstants.java
index 0eee2a5b22..76fa56b154 100644
--- a/tycho-api/src/main/java/org/eclipse/tycho/TychoConstants.java
+++ b/tycho-api/src/main/java/org/eclipse/tycho/TychoConstants.java
@@ -10,6 +10,7 @@
  * Contributors:
  *    Sonatype Inc. - initial API and implementation
  *    Christoph Läubrich - Issue #658 - Tycho strips p2 artifact properties (eg PGP, maven info...)
+ *    Marco Lehmann-Mörz - issue #2877 - tycho-versions-plugin:bump-versions does not honor SNAPSHOT suffix
  *******************************************************************************/
 package org.eclipse.tycho;
 
@@ -133,4 +134,8 @@ public interface TychoConstants {
     public String ROOTFILE_EXTENSION = "zip";
 
     String HEADER_TESTCASES = "Test-Cases";
+
+    String SUFFIX_QUALIFIER = ".qualifier";
+
+    String SUFFIX_SNAPSHOT = "-SNAPSHOT";
 }
diff --git a/tycho-core/src/main/java/org/eclipse/tycho/core/osgitools/AbstractArtifactBasedProject.java b/tycho-core/src/main/java/org/eclipse/tycho/core/osgitools/AbstractArtifactBasedProject.java
index 9f7ef58478..6a9281b8b7 100644
--- a/tycho-core/src/main/java/org/eclipse/tycho/core/osgitools/AbstractArtifactBasedProject.java
+++ b/tycho-core/src/main/java/org/eclipse/tycho/core/osgitools/AbstractArtifactBasedProject.java
@@ -14,11 +14,12 @@
 
 import org.eclipse.tycho.ReactorProject;
 import org.eclipse.tycho.TargetEnvironment;
+import org.eclipse.tycho.TychoConstants;
 import org.eclipse.tycho.core.ArtifactDependencyWalker;
 
 public abstract class AbstractArtifactBasedProject extends AbstractTychoProject {
     // this is stricter than Artifact.SNAPSHOT_VERSION
-    public static final String SNAPSHOT_VERSION = "-SNAPSHOT";
+    public static final String SNAPSHOT_VERSION = TychoConstants.SUFFIX_SNAPSHOT;
 
     // requires resolved target platform
     @Override
@@ -36,7 +37,8 @@ protected abstract ArtifactDependencyWalker newDependencyWalker(ReactorProject p
     protected String getOsgiVersion(ReactorProject project) {
         String version = project.getVersion();
         if (version.endsWith(SNAPSHOT_VERSION)) {
-            version = version.substring(0, version.length() - SNAPSHOT_VERSION.length()) + ".qualifier";
+            version = version.substring(0, version.length() - SNAPSHOT_VERSION.length())
+                    + TychoConstants.SUFFIX_QUALIFIER;
         }
         return version;
     }
diff --git a/tycho-core/src/main/java/org/eclipse/tycho/p2resolver/SourcesBundleDependencyMetadataGenerator.java b/tycho-core/src/main/java/org/eclipse/tycho/p2resolver/SourcesBundleDependencyMetadataGenerator.java
index d4d48906b9..c4a9defda0 100644
--- a/tycho-core/src/main/java/org/eclipse/tycho/p2resolver/SourcesBundleDependencyMetadataGenerator.java
+++ b/tycho-core/src/main/java/org/eclipse/tycho/p2resolver/SourcesBundleDependencyMetadataGenerator.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2008, 2011 Sonatype Inc. and others.
+ * Copyright (c) 2008, 2013 Sonatype Inc. and others.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -9,6 +9,7 @@
  *
  * Contributors:
  *    Sonatype Inc. - initial API and implementation
+ *    Marco Lehmann-Mörz - issue #2877 - tycho-versions-plugin:bump-versions does not honor SNAPSHOT suffix
  *******************************************************************************/
 package org.eclipse.tycho.p2resolver;
 
@@ -30,6 +31,7 @@
 import org.eclipse.tycho.IArtifactFacade;
 import org.eclipse.tycho.OptionalResolutionAction;
 import org.eclipse.tycho.TargetEnvironment;
+import org.eclipse.tycho.TychoConstants;
 import org.eclipse.tycho.core.publisher.TychoMavenPropertiesAdvice;
 import org.eclipse.tycho.core.shared.MavenContext;
 import org.eclipse.tycho.p2.metadata.DependencyMetadataGenerator;
@@ -42,9 +44,6 @@
 @Component(role = DependencyMetadataGenerator.class, hint = DependencyMetadataGenerator.SOURCE_BUNDLE)
 public class SourcesBundleDependencyMetadataGenerator extends AbstractMetadataGenerator
         implements DependencyMetadataGenerator {
-    private static final String SUFFIX_QUALIFIER = ".qualifier";
-
-    private static final String SUFFIX_SNAPSHOT = "-SNAPSHOT";
 
     @Requirement
     private MavenContext mavenContext;
@@ -110,8 +109,9 @@ private static String toCanonicalVersion(String version) {
         if (version == null) {
             return null;
         }
-        if (version.endsWith(SUFFIX_SNAPSHOT)) {
-            return version.substring(0, version.length() - SUFFIX_SNAPSHOT.length()) + SUFFIX_QUALIFIER;
+        if (version.endsWith(TychoConstants.SUFFIX_SNAPSHOT)) {
+            return version.substring(0, version.length() - TychoConstants.SUFFIX_SNAPSHOT.length())
+                    + TychoConstants.SUFFIX_QUALIFIER;
         }
         return version;
     }
diff --git a/tycho-packaging-plugin/src/main/java/org/eclipse/tycho/packaging/IUXmlTransformer.java b/tycho-packaging-plugin/src/main/java/org/eclipse/tycho/packaging/IUXmlTransformer.java
index 52de8d3c45..46592c190d 100644
--- a/tycho-packaging-plugin/src/main/java/org/eclipse/tycho/packaging/IUXmlTransformer.java
+++ b/tycho-packaging-plugin/src/main/java/org/eclipse/tycho/packaging/IUXmlTransformer.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 Rapicorp, Inc. and others.
+ * Copyright (c) 2015, 2023 Rapicorp, Inc. and others.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -9,6 +9,7 @@
  *
  * Contributors:
  *    Rapicorp, Inc. - initial API and implementation
+ *    Marco Lehmann-Mörz - issue #2877 - tycho-versions-plugin:bump-versions does not honor SNAPSHOT suffix
  *******************************************************************************/
 package org.eclipse.tycho.packaging;
 
@@ -23,6 +24,7 @@
 import org.eclipse.tycho.ArtifactType;
 import org.eclipse.tycho.IllegalArtifactReferenceException;
 import org.eclipse.tycho.TargetPlatform;
+import org.eclipse.tycho.TychoConstants;
 import org.eclipse.tycho.model.IU;
 
 import de.pdark.decentxml.Element;
@@ -72,7 +74,7 @@ public void replaceQualifierInCapabilities(List<Element> providedCapabilities, S
     private boolean hasQualifier(String v) {
         if (v == null)
             return false;
-        return v.endsWith(".qualifier");
+        return v.endsWith(TychoConstants.SUFFIX_QUALIFIER);
     }
 
     public void replaceQualifierInRequirements(IU iu, TargetPlatform targetPlatform) throws MojoFailureException {
@@ -81,7 +83,7 @@ public void replaceQualifierInRequirements(IU iu, TargetPlatform targetPlatform)
             return;
         for (Element req : requirements) {
             String range = req.getAttributeValue(IU.RANGE);
-            if (range != null && range.endsWith(".qualifier")
+            if (range != null && range.endsWith(TychoConstants.SUFFIX_QUALIFIER)
                     && IU.P2_IU_NAMESPACE.equals(req.getAttributeValue(IU.NAMESPACE))) {
                 ArtifactKey artifact = resolveRequirementReference(targetPlatform, req.getAttributeValue(IU.NAME),
                         range, req.toString());
diff --git a/tycho-versions-plugin/src/main/java/org/eclipse/tycho/versions/VersionBumpBuildListener.java b/tycho-versions-plugin/src/main/java/org/eclipse/tycho/versions/VersionBumpBuildListener.java
index 01ebfe7baa..54a0d17d57 100644
--- a/tycho-versions-plugin/src/main/java/org/eclipse/tycho/versions/VersionBumpBuildListener.java
+++ b/tycho-versions-plugin/src/main/java/org/eclipse/tycho/versions/VersionBumpBuildListener.java
@@ -22,6 +22,7 @@
 import org.codehaus.plexus.component.annotations.Component;
 import org.codehaus.plexus.component.annotations.Requirement;
 import org.codehaus.plexus.logging.Logger;
+import org.eclipse.tycho.TychoConstants;
 import org.eclipse.tycho.build.BuildListener;
 import org.eclipse.tycho.core.exceptions.VersionBumpRequiredException;
 import org.eclipse.tycho.helper.ProjectHelper;
@@ -78,6 +79,10 @@ public void buildEnded(MavenSession session) {
                             String newVersion = suggestedVersion.map(String::valueOf)
                                     .orElseGet(() -> Versions.incrementVersion(currentVersion,
                                             VersionBumpMojo.getIncrement(session, project, projectHelper)));
+							boolean isSnapshot = currentVersion.endsWith(TychoConstants.SUFFIX_SNAPSHOT);
+							if (isSnapshot) {
+								newVersion += TychoConstants.SUFFIX_SNAPSHOT;
+							}
                             logger.info(project.getId() + " requires a version bump from " + currentVersion + " => "
                                     + newVersion);
                             engine.setProjects(metadataReader.getProjects());
diff --git a/tycho-versions-plugin/src/main/java/org/eclipse/tycho/versions/engine/Versions.java b/tycho-versions-plugin/src/main/java/org/eclipse/tycho/versions/engine/Versions.java
index 9fd6d01405..3b6077611e 100644
--- a/tycho-versions-plugin/src/main/java/org/eclipse/tycho/versions/engine/Versions.java
+++ b/tycho-versions-plugin/src/main/java/org/eclipse/tycho/versions/engine/Versions.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2011 Sonatype Inc. and others.
+ * Copyright (c) 2011, 2023 Sonatype Inc. and others.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -9,39 +9,38 @@
  *
  * Contributors:
  *    Sonatype Inc. - initial API and implementation
+ *    Marco Lehmann-Mörz - issue #2877 - tycho-versions-plugin:bump-versions does not honor SNAPSHOT suffix
  *******************************************************************************/
 package org.eclipse.tycho.versions.engine;
 
 import java.io.File;
 
+import org.eclipse.tycho.TychoConstants;
 import org.osgi.framework.Version;
 
 public class Versions {
-    private static final String SUFFIX_QUALIFIER = ".qualifier";
-
-    private static final String SUFFIX_SNAPSHOT = "-SNAPSHOT";
-
     public static String toCanonicalVersion(String version) {
         if (version == null) {
             return null;
         }
 
-        if (version.endsWith(SUFFIX_SNAPSHOT)) {
-            return version.substring(0, version.length() - SUFFIX_SNAPSHOT.length()) + SUFFIX_QUALIFIER;
+        if (version.endsWith(TychoConstants.SUFFIX_SNAPSHOT)) {
+            return version.substring(0, version.length() - TychoConstants.SUFFIX_SNAPSHOT.length())
+                    + TychoConstants.SUFFIX_QUALIFIER;
         }
 
         return version;
     }
 
     public static String incrementVersion(String version, int increment) {
-        boolean isSnapshot = version.endsWith(SUFFIX_SNAPSHOT);
+        boolean isSnapshot = version.endsWith(TychoConstants.SUFFIX_SNAPSHOT);
         if (isSnapshot) {
-            version = version.substring(0, version.length() - SUFFIX_SNAPSHOT.length());
+            version = version.substring(0, version.length() - TychoConstants.SUFFIX_SNAPSHOT.length());
         }
         Version osgi = new Version(version);
         String incremented = osgi.getMajor() + "." + osgi.getMinor() + "." + (osgi.getMicro() + increment);
         if (isSnapshot) {
-            incremented += SUFFIX_SNAPSHOT;
+            incremented += TychoConstants.SUFFIX_SNAPSHOT;
         }
         return incremented;
     }
@@ -54,11 +53,11 @@ public static String toBaseVersion(String version) {
             return null;
         }
 
-        if (version.endsWith(SUFFIX_SNAPSHOT)) {
-            return version.substring(0, version.length() - SUFFIX_SNAPSHOT.length());
+        if (version.endsWith(TychoConstants.SUFFIX_SNAPSHOT)) {
+            return version.substring(0, version.length() - TychoConstants.SUFFIX_SNAPSHOT.length());
         }
-        if (version.endsWith(SUFFIX_QUALIFIER)) {
-            return version.substring(0, version.length() - SUFFIX_QUALIFIER.length());
+        if (version.endsWith(TychoConstants.SUFFIX_QUALIFIER)) {
+            return version.substring(0, version.length() - TychoConstants.SUFFIX_QUALIFIER.length());
         }
 
         return version;
@@ -74,8 +73,9 @@ public static String toMavenVersion(String version) {
             return null;
         }
 
-        if (version.endsWith(SUFFIX_QUALIFIER)) {
-            return version.substring(0, version.length() - SUFFIX_QUALIFIER.length()) + SUFFIX_SNAPSHOT;
+        if (version.endsWith(TychoConstants.SUFFIX_QUALIFIER)) {
+            return version.substring(0, version.length() - TychoConstants.SUFFIX_QUALIFIER.length())
+                    + TychoConstants.SUFFIX_SNAPSHOT;
         }
 
         return version;