diff --git a/org.eclipse.xtext.dev-bom/pom.xml b/org.eclipse.xtext.dev-bom/pom.xml
index 40d4438817f..fd473d770e9 100644
--- a/org.eclipse.xtext.dev-bom/pom.xml
+++ b/org.eclipse.xtext.dev-bom/pom.xml
@@ -287,37 +287,37 @@
 			<dependency>
 				<groupId>org.eclipse.lsp4j</groupId>
 				<artifactId>org.eclipse.lsp4j.debug</artifactId>
-				<version>0.21.0</version>
+				<version>0.21.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.eclipse.lsp4j</groupId>
 				<artifactId>org.eclipse.lsp4j.generator</artifactId>
-				<version>0.21.0</version>
+				<version>0.21.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.eclipse.lsp4j</groupId>
 				<artifactId>org.eclipse.lsp4j.jsonrpc.debug</artifactId>
-				<version>0.21.0</version>
+				<version>0.21.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.eclipse.lsp4j</groupId>
 				<artifactId>org.eclipse.lsp4j.jsonrpc</artifactId>
-				<version>0.21.0</version>
+				<version>0.21.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.eclipse.lsp4j</groupId>
 				<artifactId>org.eclipse.lsp4j.websocket.jakarta</artifactId>
-				<version>0.21.0</version>
+				<version>0.21.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.eclipse.lsp4j</groupId>
 				<artifactId>org.eclipse.lsp4j.websocket</artifactId>
-				<version>0.21.0</version>
+				<version>0.21.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.eclipse.lsp4j</groupId>
 				<artifactId>org.eclipse.lsp4j</artifactId>
-				<version>0.21.0</version>
+				<version>0.21.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.eclipse.platform</groupId>
diff --git a/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF
index f59048811f6..35faa879f86 100644
--- a/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF
@@ -14,8 +14,8 @@ Require-Bundle: org.eclipse.xtext;visibility:=reexport,
  org.eclipse.core.runtime;bundle-version="3.24.100",
  org.eclipse.xtext.ide,
  org.junit;bundle-version="4.13.2",
- org.eclipse.lsp4j;bundle-version="[0.21.0,0.22.0)";resolution:=optional,
- org.eclipse.lsp4j.jsonrpc;bundle-version="[0.21.0,0.22.0)";resolution:=optional,
+ org.eclipse.lsp4j;bundle-version="[0.21.1,0.22.0)";resolution:=optional,
+ org.eclipse.lsp4j.jsonrpc;bundle-version="[0.21.1,0.22.0)";resolution:=optional,
  org.eclipse.xtext.testlanguages,
  org.eclipse.xtext.testlanguages.ide,
  org.eclipse.emf.mwe2.lib;bundle-version="2.15.0",
diff --git a/org.eclipse.xtext.ide/META-INF/MANIFEST.MF b/org.eclipse.xtext.ide/META-INF/MANIFEST.MF
index b83d634349f..14a397fa809 100644
--- a/org.eclipse.xtext.ide/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ide/META-INF/MANIFEST.MF
@@ -11,8 +11,8 @@ Require-Bundle: org.eclipse.xtext;visibility:=reexport,
  org.eclipse.xtend.lib,
  org.eclipse.core.runtime;bundle-version="3.24.100";resolution:=optional;x-installation:=greedy,
  org.eclipse.equinox.common;bundle-version="3.16.0",
- org.eclipse.lsp4j;bundle-version="[0.21.0,0.22.0)";resolution:=optional,
- org.eclipse.lsp4j.jsonrpc;bundle-version="[0.21.0,0.22.0)";resolution:=optional,
+ org.eclipse.lsp4j;bundle-version="[0.21.1,0.22.0)";resolution:=optional,
+ org.eclipse.lsp4j.jsonrpc;bundle-version="[0.21.1,0.22.0)";resolution:=optional,
  org.eclipse.emf.ecore.change;bundle-version="[2.14.0,3)",
  com.google.guava
 Import-Package: org.apache.log4j;version="1.2.24"
diff --git a/xtext-latest.target b/xtext-latest.target
index 5c9d857b9ca..3f0ea6d9230 100644
--- a/xtext-latest.target
+++ b/xtext-latest.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="xtext-latest" sequenceNumber="4">
+<target name="xtext-latest" sequenceNumber="5">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/m2t/xpand/updates/releases/R201605260315/"/>
@@ -35,7 +35,7 @@
 			<repository location="https://download.eclipse.org/eclipse/updates/4.29-I-builds" />
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.0"/>
+			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.1"/>
 			<unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
diff --git a/xtext-r202203.target b/xtext-r202203.target
index fa16546a14d..4b2e1fc27eb 100644
--- a/xtext-r202203.target
+++ b/xtext-r202203.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="xtext-r202203" sequenceNumber="4">
+<target name="xtext-r202203" sequenceNumber="5">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/m2t/xpand/updates/releases/R201605260315/"/>
@@ -33,7 +33,7 @@
 			<unit id="org.eclipse.buildship.feature.group" version="0.0.0" />
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.0"/>
+			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.1"/>
 			<unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
diff --git a/xtext-r202206.target b/xtext-r202206.target
index b524d1ffa65..e28e2d4068d 100644
--- a/xtext-r202206.target
+++ b/xtext-r202206.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="xtext-r202206" sequenceNumber="4">
+<target name="xtext-r202206" sequenceNumber="5">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/m2t/xpand/updates/releases/R201605260315/"/>
@@ -32,7 +32,7 @@
 			<unit id="org.eclipse.buildship.feature.group" version="0.0.0" />
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.0"/>
+			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.1"/>
 			<unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
diff --git a/xtext-r202209.target b/xtext-r202209.target
index b6ed8f241c7..56593e73cc1 100644
--- a/xtext-r202209.target
+++ b/xtext-r202209.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="xtext-r202209" sequenceNumber="4">
+<target name="xtext-r202209" sequenceNumber="5">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/m2t/xpand/updates/releases/R201605260315/"/>
@@ -37,7 +37,7 @@
 			<unit id="org.eclipse.buildship.feature.group" version="0.0.0" />
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.0"/>
+			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.1"/>
 			<unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
diff --git a/xtext-r202212.target b/xtext-r202212.target
index f83d6ead52b..ccfcdf0773b 100644
--- a/xtext-r202212.target
+++ b/xtext-r202212.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="xtext-r202212" sequenceNumber="4">
+<target name="xtext-r202212" sequenceNumber="5">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/m2t/xpand/updates/releases/R201605260315/"/>
@@ -37,7 +37,7 @@
 			<unit id="org.eclipse.buildship.feature.group" version="0.0.0" />
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.0"/>
+			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.1"/>
 			<unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
diff --git a/xtext-r202303.target b/xtext-r202303.target
index 3cf9d9ff37a..7228345d5db 100644
--- a/xtext-r202303.target
+++ b/xtext-r202303.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="xtext-r202303" sequenceNumber="4">
+<target name="xtext-r202303" sequenceNumber="5">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/m2t/xpand/updates/releases/R201605260315/"/>
@@ -37,7 +37,7 @@
 			<unit id="org.eclipse.buildship.feature.group" version="0.0.0" />
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.0"/>
+			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.1"/>
 			<unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
diff --git a/xtext-r202306.target b/xtext-r202306.target
index a056640de1f..8afc5a918ce 100644
--- a/xtext-r202306.target
+++ b/xtext-r202306.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="xtext-r202306" sequenceNumber="4">
+<target name="xtext-r202306" sequenceNumber="5">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/m2t/xpand/updates/releases/R201605260315/"/>
@@ -37,7 +37,7 @@
 			<unit id="org.eclipse.buildship.feature.group" version="0.0.0" />
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.0"/>
+			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.1"/>
 			<unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
diff --git a/xtext-r202309.target b/xtext-r202309.target
index 74ff2a4e66a..41bb0588a7e 100644
--- a/xtext-r202309.target
+++ b/xtext-r202309.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="xtext-r202309" sequenceNumber="4">
+<target name="xtext-r202309" sequenceNumber="5">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/m2t/xpand/updates/releases/R201605260315/"/>
@@ -37,7 +37,7 @@
 			<unit id="org.eclipse.buildship.feature.group" version="0.0.0" />
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.0"/>
+			<repository location="https://download.eclipse.org/lsp4j/updates/releases/0.21.1"/>
 			<unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">