diff --git a/releng/CDT.setup b/releng/CDT.setup
index b19025e375c..a37d1caf48f 100644
--- a/releng/CDT.setup
+++ b/releng/CDT.setup
@@ -256,7 +256,7 @@
           <repository
               url="https://download.eclipse.org/cbi/updates/license/"/>
           <repository
-              url="https://download.eclipse.org/eclipse/updates/4.17milestones/S-4.17M3-202008200230/"/>
+              url="https://download.eclipse.org/eclipse/updates/4.17milestones/S-4.17RC1-202008261800/"/>
           <repository
               url="https://download.eclipse.org/egit/updates/"/>
           <repository
@@ -276,7 +276,7 @@
           <repository
               url="https://download.eclipse.org/tm4e/releases/0.3.4/"/>
           <repository
-              url="https://download.eclipse.org/tools/cdt/builds/10.0/cdt-10.0.0-m1/">
+              url="https://download.eclipse.org/tools/cdt/builds/10.0/cdt-10.0.0-m3a/">
             <annotation>
               <detail
                   key="description">
diff --git a/releng/org.eclipse.cdt.target/cdt.target b/releng/org.eclipse.cdt.target/cdt.target
index 5e2b574fc48..ed4b8111b44 100644
--- a/releng/org.eclipse.cdt.target/cdt.target
+++ b/releng/org.eclipse.cdt.target/cdt.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="cdt" sequenceNumber="90">
+<target name="cdt" sequenceNumber="92">
 <locations>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.license.feature.group" version="0.0.0"/>
@@ -11,7 +11,7 @@
 <unit id="org.eclipse.jdt.annotation" version="0.0.0"/>
 <unit id="org.eclipse.sdk.feature.group" version="0.0.0"/>
 <unit id="org.eclipse.test.feature.group" version="0.0.0"/>
-<repository location="https://download.eclipse.org/eclipse/updates/4.17milestones/S-4.17M3-202008200230/"/>
+<repository location="https://download.eclipse.org/eclipse/updates/4.17milestones/S-4.17RC1-202008261800/"/>
 </location>
 	<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 		<repository location="https://download.eclipse.org/egit/updates"/>
@@ -46,7 +46,7 @@
 <repository location="https://download.eclipse.org/tm4e/releases/0.3.4/"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-<repository location="https://download.eclipse.org/tools/cdt/builds/10.0/cdt-10.0.0-m1/"/>
+<repository location="https://download.eclipse.org/tools/cdt/builds/10.0/cdt-10.0.0-m3a/"/>
 <!-- We explicitly have CDT in target platform so that developers can develop org.eclipse.cdt.core/ui without requiring all the projects from CDT in their workspace. -->
 	<unit id="org.eclipse.cdt.feature.group" version="0.0.0"/>
 </location>