diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 81de2cc..bd22f4f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
         with:
           components: clippy, rustfmt
       - uses: Swatinem/rust-cache@v2
-      - run: sudo apt-get update && sudo apt-get install -y libelf-dev
+      - run: sudo apt-get update && sudo apt-get install -y libelf-dev libbpf-dev
       - run: cargo fmt --all --check
       - run: cargo clippy --all-targets --all-features -- -D warnings
       - run: cargo check --all-features
diff --git a/deploy/docker/Dockerfile.paper b/deploy/docker/Dockerfile.paper
index 0a9c653..b4f60be 100644
--- a/deploy/docker/Dockerfile.paper
+++ b/deploy/docker/Dockerfile.paper
@@ -1,16 +1,20 @@
 FROM eclipse-temurin:21-jre-noble
 
-ARG PAPER_VERSION=1.21.4
+ARG PAPER_VERSION=1.21
 ARG PAPER_BUILD=latest
 
-RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y curl jq && rm -rf /var/lib/apt/lists/*
 
 # Download Paper
-RUN curl -fsSLo /opt/paper.jar \
-    "https://api.papermc.io/v2/projects/paper/versions/${PAPER_VERSION}/builds/${PAPER_BUILD}/downloads/paper-${PAPER_VERSION}-${PAPER_BUILD}.jar" || \
-    echo "Falling back to direct download..." && \
-    curl -fsSLo /opt/paper.jar \
-    "https://papermc.io/api/v2/projects/paper/versions/${PAPER_VERSION}/builds/${PAPER_BUILD}/downloads/paper-${PAPER_VERSION}-${PAPER_BUILD}.jar"
+RUN VERSION="${PAPER_VERSION}" && \
+    BUILD="${PAPER_BUILD}" && \
+    BUILDS_JSON=$(curl -s -H "User-Agent: rampart/1.0.0 (https://github.com/loki5512344/rampart)" \
+        "https://fill.papermc.io/v3/projects/paper/versions/${VERSION}/builds") && \
+    if [ "${BUILD}" = "latest" ]; then \
+        BUILD=$(echo "${BUILDS_JSON}" | jq -r 'first(.[] | select(.channel == "STABLE") | .id) // empty'); \
+    fi && \
+    URL=$(echo "${BUILDS_JSON}" | jq -r --arg b "${BUILD}" 'first(.[] | select(.id == ($b | tonumber)) | .downloads."server:default".url) // empty') && \
+    curl -fsSLo /opt/paper.jar "${URL}"
 
 COPY deploy/config/server.properties /opt/server.properties
 COPY deploy/config/paper-global.yml /opt/paper-global.yml
diff --git a/deploy/docker/Dockerfile.velocity b/deploy/docker/Dockerfile.velocity
index f02903c..459b238 100644
--- a/deploy/docker/Dockerfile.velocity
+++ b/deploy/docker/Dockerfile.velocity
@@ -1,15 +1,22 @@
 FROM eclipse-temurin:21-jre-noble
 
-ARG VELOCITY_VERSION=3.4.0-SNAPSHOT
-ARG VELOCITY_BUILD=latest
+ARG VELOCITY_VERSION=4.0.0
+ARG VELOCITY_BUILD=6
 
-RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y curl jq && rm -rf /var/lib/apt/lists/*
 
 # Download Velocity
-RUN curl -fsSLo /opt/velocity.jar \
-    "https://api.papermc.io/v2/projects/velocity/versions/${VELOCITY_VERSION}/builds/${VELOCITY_BUILD}/downloads/velocity-${VELOCITY_VERSION}-${VELOCITY_BUILD}.jar" || \
-    curl -fsSLo /opt/velocity.jar \
-    "https://versions.velocitypowered.com/download/${VELOCITY_VERSION}.jar"
+RUN VERSION="${VELOCITY_VERSION}" && \
+    BUILD="${VELOCITY_BUILD}" && \
+    if [ "${BUILD}" = "latest" ]; then \
+        BUILD=$(curl -s -H "User-Agent: rampart/1.0.0 (https://github.com/loki5512344/rampart)" \
+            "https://fill.papermc.io/v3/projects/velocity/versions/${VERSION}/builds" | \
+            jq -r 'first(.[] | select(.channel == "STABLE") | .id) // empty'); \
+    fi && \
+    URL=$(curl -s -H "User-Agent: rampart/1.0.0 (https://github.com/loki5512344/rampart)" \
+        "https://fill.papermc.io/v3/projects/velocity/versions/${VERSION}/builds" | \
+        jq -r --arg b "${BUILD}" 'first(.[] | select(.id == ($b | tonumber)) | .downloads."server:default".url) // empty') && \
+    curl -fsSLo /opt/velocity.jar "${URL}"
 
 COPY deploy/config/velocity.toml /opt/velocity.toml
 COPY plugins/velocity/build/libs/rampart-velocity-*.jar /opt/plugins/