diff --git a/cmake/Python_version.in b/cmake/Python_version.in
index 219b1d74a..ce2cc7ff3 100644
--- a/cmake/Python_version.in
+++ b/cmake/Python_version.in
@@ -1 +1 @@
-@xgboost_VERSION_MAJOR@.@xgboost_VERSION_MINOR@.@xgboost_VERSION_PATCH@-SNAPSHOT
\ No newline at end of file
+@xgboost_VERSION_MAJOR@.@xgboost_VERSION_MINOR@.@xgboost_VERSION_PATCH@rc1
diff --git a/jvm-packages/pom.xml b/jvm-packages/pom.xml
index 4d3a7dfa0..f84b2b426 100644
--- a/jvm-packages/pom.xml
+++ b/jvm-packages/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>ml.dmlc</groupId>
     <artifactId>xgboost-jvm_2.12</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
+    <version>1.3.0-RC1</version>
     <packaging>pom</packaging>
     <name>XGBoost JVM Package</name>
     <description>JVM Package for XGBoost</description>
diff --git a/jvm-packages/xgboost4j-example/pom.xml b/jvm-packages/xgboost4j-example/pom.xml
index 4f493caa4..aead7642f 100644
--- a/jvm-packages/xgboost4j-example/pom.xml
+++ b/jvm-packages/xgboost4j-example/pom.xml
@@ -6,10 +6,10 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>1.3.0-SNAPSHOT</version>
+        <version>1.3.0-RC1</version>
     </parent>
     <artifactId>xgboost4j-example_2.12</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
+    <version>1.3.0-RC1</version>
     <packaging>jar</packaging>
     <build>
         <plugins>
@@ -26,7 +26,7 @@
         <dependency>
             <groupId>ml.dmlc</groupId>
             <artifactId>xgboost4j-spark_${scala.binary.version}</artifactId>
-            <version>1.3.0-SNAPSHOT</version>
+            <version>1.3.0-RC1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
@@ -37,7 +37,7 @@
         <dependency>
             <groupId>ml.dmlc</groupId>
             <artifactId>xgboost4j-flink_${scala.binary.version}</artifactId>
-            <version>1.3.0-SNAPSHOT</version>
+            <version>1.3.0-RC1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
diff --git a/jvm-packages/xgboost4j-flink/pom.xml b/jvm-packages/xgboost4j-flink/pom.xml
index a65823a22..8e948be5a 100644
--- a/jvm-packages/xgboost4j-flink/pom.xml
+++ b/jvm-packages/xgboost4j-flink/pom.xml
@@ -6,10 +6,10 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>1.3.0-SNAPSHOT</version>
+        <version>1.3.0-RC1</version>
     </parent>
     <artifactId>xgboost4j-flink_2.12</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
+    <version>1.3.0-RC1</version>
     <build>
         <plugins>
             <plugin>
@@ -26,7 +26,7 @@
         <dependency>
             <groupId>ml.dmlc</groupId>
             <artifactId>xgboost4j_${scala.binary.version}</artifactId>
-            <version>1.3.0-SNAPSHOT</version>
+            <version>1.3.0-RC1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
diff --git a/jvm-packages/xgboost4j-gpu/pom.xml b/jvm-packages/xgboost4j-gpu/pom.xml
index 2b20bb8f1..b992bd456 100644
--- a/jvm-packages/xgboost4j-gpu/pom.xml
+++ b/jvm-packages/xgboost4j-gpu/pom.xml
@@ -6,10 +6,10 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>1.3.0-SNAPSHOT</version>
+        <version>1.3.0-RC1</version>
     </parent>
     <artifactId>xgboost4j-gpu_2.12</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
+    <version>1.3.0-RC1</version>
     <packaging>jar</packaging>
 
     <dependencies>
diff --git a/jvm-packages/xgboost4j-spark-gpu/pom.xml b/jvm-packages/xgboost4j-spark-gpu/pom.xml
index 9777f176d..c5e6de669 100644
--- a/jvm-packages/xgboost4j-spark-gpu/pom.xml
+++ b/jvm-packages/xgboost4j-spark-gpu/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>1.3.0-SNAPSHOT</version>
+        <version>1.3.0-RC1</version>
     </parent>
     <artifactId>xgboost4j-spark-gpu_2.12</artifactId>
     <build>
@@ -24,7 +24,7 @@
         <dependency>
             <groupId>ml.dmlc</groupId>
             <artifactId>xgboost4j-gpu_${scala.binary.version}</artifactId>
-            <version>1.3.0-SNAPSHOT</version>
+            <version>1.3.0-RC1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
diff --git a/jvm-packages/xgboost4j-spark/pom.xml b/jvm-packages/xgboost4j-spark/pom.xml
index 6435a17f3..737f98269 100644
--- a/jvm-packages/xgboost4j-spark/pom.xml
+++ b/jvm-packages/xgboost4j-spark/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>1.3.0-SNAPSHOT</version>
+        <version>1.3.0-RC1</version>
     </parent>
     <artifactId>xgboost4j-spark_2.12</artifactId>
     <build>
@@ -24,7 +24,7 @@
         <dependency>
             <groupId>ml.dmlc</groupId>
             <artifactId>xgboost4j_${scala.binary.version}</artifactId>
-            <version>1.3.0-SNAPSHOT</version>
+            <version>1.3.0-RC1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
diff --git a/jvm-packages/xgboost4j/pom.xml b/jvm-packages/xgboost4j/pom.xml
index d285f5370..89cd14e1b 100644
--- a/jvm-packages/xgboost4j/pom.xml
+++ b/jvm-packages/xgboost4j/pom.xml
@@ -6,10 +6,10 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>1.3.0-SNAPSHOT</version>
+        <version>1.3.0-RC1</version>
     </parent>
     <artifactId>xgboost4j_2.12</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
+    <version>1.3.0-RC1</version>
     <packaging>jar</packaging>
 
     <dependencies>
diff --git a/python-package/xgboost/VERSION b/python-package/xgboost/VERSION
index 9d7c109bb..2dd64f41e 100644
--- a/python-package/xgboost/VERSION
+++ b/python-package/xgboost/VERSION
@@ -1 +1 @@
-1.3.0-SNAPSHOT
+1.3.0rc1
diff --git a/tests/ci_build/Dockerfile.jvm b/tests/ci_build/Dockerfile.jvm
index b16182102..6db68a2d1 100644
--- a/tests/ci_build/Dockerfile.jvm
+++ b/tests/ci_build/Dockerfile.jvm
@@ -31,7 +31,7 @@ ENV CPP=/opt/rh/devtoolset-4/root/usr/bin/cpp
 
 # Install Python packages
 RUN \
-    pip install numpy pytest scipy scikit-learn wheel kubernetes urllib3==1.22 awscli
+    pip install numpy pytest scipy scikit-learn wheel kubernetes urllib3==1.25.10 awscli
 
 ENV GOSU_VERSION 1.10
 
diff --git a/tests/ci_build/Dockerfile.jvm_gpu_build b/tests/ci_build/Dockerfile.jvm_gpu_build
index 941b4cd2f..0439f4238 100644
--- a/tests/ci_build/Dockerfile.jvm_gpu_build
+++ b/tests/ci_build/Dockerfile.jvm_gpu_build
@@ -45,7 +45,7 @@ ENV CPP=/opt/rh/devtoolset-4/root/usr/bin/cpp
 
 # Install Python packages
 RUN \
-    pip install numpy pytest scipy scikit-learn wheel kubernetes urllib3==1.22 awscli
+    pip install numpy pytest scipy scikit-learn wheel kubernetes urllib3==1.25.10 awscli
 
 ENV GOSU_VERSION 1.10