diff --git a/config/euro-office/init-wopi.sh b/config/euro-office/init-wopi.sh
new file mode 100644
index 0000000..8893c35
--- /dev/null
+++ b/config/euro-office/init-wopi.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+set -e
+
+CONFIG_FILE="/etc/onlyoffice/documentserver/local.json"
+DATA_DIR="/var/www/onlyoffice/Data"
+WOPI_PRIVATE_KEY="${DATA_DIR}/wopi_private.key"
+WOPI_PUBLIC_KEY="${DATA_DIR}/wopi_public.key"
+
+if [ "${WOPI_ENABLED:-false}" = "true" ]; then
+    mkdir -p "$DATA_DIR"
+
+    if [ ! -f "$WOPI_PRIVATE_KEY" ]; then
+        echo "Generating WOPI private key..."
+        openssl genpkey -algorithm RSA -outform PEM -out "$WOPI_PRIVATE_KEY" >/dev/null 2>&1
+    fi
+
+    if [ ! -f "$WOPI_PUBLIC_KEY" ]; then
+        echo "Generating WOPI public key..."
+        openssl rsa -RSAPublicKey_out -in "$WOPI_PRIVATE_KEY" \
+            -outform "MS PUBLICKEYBLOB" -out "$WOPI_PUBLIC_KEY" >/dev/null 2>&1
+    fi
+
+    WOPI_PRIVATE_KEY_CONTENT=$(cat "$WOPI_PRIVATE_KEY")
+    WOPI_PUBLIC_KEY_CONTENT=$(openssl base64 -in "$WOPI_PUBLIC_KEY" -A)
+    WOPI_MODULUS=$(openssl rsa -pubin -inform "MS PUBLICKEYBLOB" -modulus -noout \
+        -in "$WOPI_PUBLIC_KEY" | sed 's/Modulus=//' | \
+        python3 -c "import sys,binascii,base64; print(base64.b64encode(binascii.unhexlify(sys.stdin.read().strip())).decode())")
+    
+    WOPI_EXPONENT=$(openssl rsa -pubin -inform "MS PUBLICKEYBLOB" -text -noout \
+        -in "$WOPI_PUBLIC_KEY" | grep -oP '(?<=Exponent: )\d+')
+
+    # Merge WOPI config into local.json
+    jq \
+        --argjson wopiEnabled "true" \
+        --arg wopiPrivateKey "$WOPI_PRIVATE_KEY_CONTENT" \
+        --arg wopiPublicKey "$WOPI_PUBLIC_KEY_CONTENT" \
+        --arg wopiModulus "$WOPI_MODULUS" \
+        --arg wopiExponent "$WOPI_EXPONENT" \
+        '.wopi.enable = $wopiEnabled |
+         .wopi.privateKey = $wopiPrivateKey |
+         .wopi.privateKeyOld = $wopiPrivateKey |
+         .wopi.publicKey = $wopiPublicKey |
+         .wopi.publicKeyOld = $wopiPublicKey |
+         .wopi.modulus = $wopiModulus |
+         .wopi.modulusOld = $wopiModulus |
+         .wopi.exponent = ($wopiExponent | tonumber) |
+         .wopi.exponentOld = ($wopiExponent | tonumber)' \
+        "$CONFIG_FILE" > "${CONFIG_FILE}.tmp"
+
+    mv "${CONFIG_FILE}.tmp" "$CONFIG_FILE"
+    echo "WOPI configuration injected successfully."
+fi
+
+# Hand over to the official DocumentServer entrypoint
+exec /entrypoint.sh "$@"
diff --git a/weboffice/euroffice.yml b/weboffice/euroffice.yml
index 200918d..803ed77 100644
--- a/weboffice/euroffice.yml
+++ b/weboffice/euroffice.yml
@@ -58,7 +58,11 @@ services:
       JWT_SECRET: "${EURO_OFFICE_JWT_SECRET:-changeme}"
       # self-signed certificates
       USE_UNAUTHORIZED_STORAGE: "${INSECURE:-false}"
+    entrypoint:
+      - /bin/sh
+      - /init-wopi.sh
     volumes:
+      - ./config/euro-office/init-wopi.sh:/init-wopi.sh:ro
       - ./config/euro-office/onlyoffice-docs-formats.json:/var/www/onlyoffice/documentserver/document-formats/onlyoffice-docs-formats.json
     logging:
       driver: ${LOG_DRIVER:-local}