diff --git a/README.md b/README.md
index 2a644fe..8621bbc 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Get SPDX license overview
 | parameter | description | required | default |
 | - | - | - | - |
 | project | project | `true` | spdx-builder |
-| spdx-builder-version | spdx-builder-version | `true` | v0.7.0 |
+| spdx-builder-version | spdx-builder-version | `true` | v0.8.1 |
 | mode | Scan mode. Can be 'ort', 'blackduck' or 'tree' | `true` | ort |
 | scanner-url | scanner-url (license-scanner) | `false` |  |
 | bombase-url | bombase-url (in case of mode: 'tree') | `false` |  |
@@ -43,6 +43,7 @@ Get SPDX license overview
 | blackduck-token | Blackduck token (in case of mode: 'blackduck') | `false` |  |
 | blackduck-project | Blackduck project (in case of mode: 'blackduck') | `false` |  |
 | blackduck-version | Blackduck version (in case of mode: 'blackduck') | `false` |  |
+| optional-arguments | Optional arguments like `--tree`, `--release`, `--force` and `--custom` | `false` |  |
 
 
 
@@ -80,7 +81,7 @@ Make sure you have a proper `.spdx-builder.yml` file in your project.
       java-version: '11.0.1'
   - name: Create spdx-file
     id: spdx-builder
-    uses: philips-software/spdx-action@v0.6.0
+    uses: philips-software/spdx-action@v0.8.1
     with:
       project: my-project
       mode: ort
@@ -101,7 +102,7 @@ Make sure you have a proper `.spdx-builder.yml` file in your project.
       npm list --all --production > npm-dependencies.txt
   - name: Create spdx-file
     id: spdx-builder
-    uses: philips-software/spdx-action@v0.6.0
+    uses: philips-software/spdx-action@v0.8.1
      with:
       project: my-project
       mode: 'tree'
@@ -122,7 +123,7 @@ Make sure you have a proper `.spdx-builder.yml` file in your project.
       java-version: '11.0.1'
   - name: Create spdx-file
     id: spdx-builder
-    uses: philips-software/spdx-action@v0.6.0
+    uses: philips-software/spdx-action@v0.8.1
     with:
       project: my-project
       mode: 'blackduck'
@@ -149,7 +150,3 @@ This module is part of the Philips Forest.
 
                                                                             CI
 ```
-
-Talk to the forestkeepers in the `forest`-channel on Slack.
-
-[![Slack](https://philips-software-slackin.now.sh/badge.svg)](https://philips-software-slackin.now.sh)
diff --git a/action.yml b/action.yml
index c5c38ca..99b8d0f 100644
--- a/action.yml
+++ b/action.yml
@@ -21,7 +21,7 @@ inputs:
   spdx-builder-version:
     description: "spdx-builder-version"
     required: true
-    default: 'v0.7.0'
+    default: 'v0.8.1'
   mode:
     description: "Scan mode. Can be 'ort', 'blackduck' or 'tree'"
     required: true
@@ -63,6 +63,9 @@ inputs:
   blackduck-version:
     description: "Blackduck version (in case of mode: 'blackduck')"
     required: false
+  optional-arguments:
+    description: "Optional arguments like `--tree`, `--release`, `--force` and `--custom`"
+    required: false
 
 runs:
   using: "composite"
@@ -82,6 +85,7 @@ runs:
       env:
         ORT_FILE: ${{ inputs.ort-file }}
         MODE: ${{ inputs.mode }}
+        OPTIONAL_ARGUMENTS: ${{ inputs.optional-arguments }}
     - name: Create SPDX file with ORT
       id: spdx-ort
       run: |
@@ -94,6 +98,7 @@ runs:
         echo "    SCANNER_URL          : ${SCANNER_URL} "
         echo "    UPLOAD_URL           : ${UPLOAD_URL} "
         echo "    ORT_FILE             : ${ORT_FILE} "
+        echo "    OPTIONAL_ARGUMENTS   : ${OPTIONAL_ARGUMENTS} "
         echo "--------------------------------------------------------------------"
         echo ""
         echo "--------------------------------------------------------------------"
@@ -116,9 +121,14 @@ runs:
         [ -z "$UPLOAD_URL" ] && UPLOAD_ARG="" || UPLOAD_ARG="--upload ${UPLOAD_URL}"
         echo "          UPLOAD_ARG: ${UPLOAD_ARG}"
         echo "--------------------------------------------------------------------"
+        echo " Set OPTIONAL_ARG"
+        echo "--------------------------------------------------------------------"
+        [ -z "$OPTIONAL_ARGUMENTS" ] && OPTIONAL_ARG="" || OPTIONAL_ARG="${OPTIONAL_ARGUMENTS}"
+        echo "          OPTIONAL_ARG: ${OPTIONAL_ARG}"
+        echo "--------------------------------------------------------------------"
         echo " Running SPDX-builder"
         echo "--------------------------------------------------------------------"
-        java -jar spdx-builder.jar ort -c .spdx-builder.yml -o ${PROJECT}.spdx ${INPUT_FILE} ${SCANNER_ARG} ${UPLOAD_ARG}
+        java -jar spdx-builder.jar ort -c .spdx-builder.yml -o ${PROJECT}.spdx ${INPUT_FILE} ${SCANNER_ARG} ${UPLOAD_ARG} ${OPTIONAL_ARG}
         echo "--------------------------------------------------------------------"
         echo "Finished!"
         echo "--------------------------------------------------------------------"
@@ -130,6 +140,7 @@ runs:
         ORT_FILE: ${{ inputs.ort-file }}
         UPLOAD_URL: ${{ inputs.upload-url }}
         MODE: ${{ inputs.mode }}
+        OPTIONAL_ARGUMENTS: ${{ inputs.optional-arguments }}
       shell: bash
     - name: Create SPDX file with tree
       id: spdx-tree
@@ -144,6 +155,7 @@ runs:
         echo "    UPLOAD_URL           : ${UPLOAD_URL} "
         echo "    TREE                 : ${TREE} "
         echo "    FORMAT               : ${FORMAT} "
+        echo "    OPTIONAL_ARGUMENTS   : ${OPTIONAL_ARGUMENTS} "
         echo "--------------------------------------------------------------------"
         echo ""
         echo "--------------------------------------------------------------------"
@@ -161,9 +173,14 @@ runs:
         [ -z "$UPLOAD_URL" ] && UPLOAD_ARG="" || UPLOAD_ARG="--upload ${UPLOAD_URL}"
         echo "          UPLOAD_ARG: ${UPLOAD_ARG}"
         echo "--------------------------------------------------------------------"
+        echo " Set OPTIONAL_ARG"
+        echo "--------------------------------------------------------------------"
+        [ -z "$OPTIONAL_ARGUMENTS" ] && OPTIONAL_ARG="" || OPTIONAL_ARG="${OPTIONAL_ARGUMENTS}"
+        echo "          OPTIONAL_ARG: ${OPTIONAL_ARG}"
+        echo "--------------------------------------------------------------------"
         echo " Running SPDX-builder"
         echo "--------------------------------------------------------------------"
-        cat "${TREE}" | java -jar spdx-builder.jar tree -f ${FORMAT} -c .spdx-builder.yml -o ${PROJECT}.spdx ${BOMBASE_ARG} ${UPLOAD_ARG}
+        cat "${TREE}" | java -jar spdx-builder.jar tree -f ${FORMAT} -c .spdx-builder.yml -o ${PROJECT}.spdx ${BOMBASE_ARG} ${UPLOAD_ARG} ${OPTIONAL_ARG}
         echo "--------------------------------------------------------------------"
         echo "Finished!"
         echo "--------------------------------------------------------------------"
@@ -175,6 +192,7 @@ runs:
         FORMAT: ${{ inputs.format }}
         UPLOAD_URL: ${{ inputs.upload-url }}
         MODE: ${{ inputs.mode }}
+        OPTIONAL_ARGUMENTS: ${{ inputs.optional-arguments }}
       shell: bash
     - name: Create SPDX file with blackduck
       id: spdx-blackduck
@@ -191,6 +209,7 @@ runs:
         echo "    BLACKDUCK_VERSION    : ${BLACKUCK_VERSION} "
         echo "    BLACKDUCK_URL        : ${BLACKUCK_URL} "
         echo "    BLACKDUCK_TOKEN      : ${BLACKUCK_TOKEN} "
+        echo "    OPTIONAL_ARGUMENTS   : ${OPTIONAL_ARGUMENTS} "
         echo "--------------------------------------------------------------------"
         echo ""
         echo "--------------------------------------------------------------------"
@@ -208,9 +227,14 @@ runs:
         [ -z "$UPLOAD_URL" ] && UPLOAD_ARG="" || UPLOAD_ARG="--upload ${UPLOAD_URL}"
         echo "          UPLOAD_ARG: ${UPLOAD_ARG}"
         echo "--------------------------------------------------------------------"
+        echo " Set OPTIONAL_ARG"
+        echo "--------------------------------------------------------------------"
+        [ -z "$OPTIONAL_ARGUMENTS" ] && OPTIONAL_ARG="" || OPTIONAL_ARG="${OPTIONAL_ARGUMENTS}"
+        echo "          OPTIONAL_ARG: ${OPTIONAL_ARG}"
+        echo "--------------------------------------------------------------------"
         echo " Running SPDX-builder"
         echo "--------------------------------------------------------------------"
-        java -jar spdx-builder.jar blackduck -o ${PROJECT}.spdx --url ${BLACKDUCK_URL} --token ${BLACKDUCK_TOKEN} ${BLACKDUCK_PROJECT} ${BLACKDUCK_VERSION} ${BOMBASE_ARG} ${UPLOAD_ARG}
+        java -jar spdx-builder.jar blackduck -o ${PROJECT}.spdx --url ${BLACKDUCK_URL} --token ${BLACKDUCK_TOKEN} ${BLACKDUCK_PROJECT} ${BLACKDUCK_VERSION} ${BOMBASE_ARG} ${UPLOAD_ARG} ${OPTIONAL_ARG}
         echo "--------------------------------------------------------------------"
         echo "Finished!"
         echo "--------------------------------------------------------------------"