diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6416640..e18b7a6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -38,7 +38,7 @@ jobs:
         uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-        if: matrix.python-version == '3.8'
+        if: matrix.python-version == '3.9'
 
       - name: Look for security vulnerabilities in dependencies
         run: poetry run safety check --full-report
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index f30bb7a..0468f99 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -18,10 +18,10 @@ jobs:
       - name: Install poetry
         run: pipx install poetry
 
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.9
           cache: 'poetry'
 
       - name: Install dependencies
@@ -40,10 +40,10 @@ jobs:
       - name: Install poetry
         run: pipx install poetry
 
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.9
 
       - name: Build and upload to PyPI
         env:
diff --git a/CITATION.cff b/CITATION.cff
index 4403a37..bd36f5a 100755
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -10,11 +10,14 @@ authors:
   - family-names: Rajendram Bashyam
     given-names: Lakshmi
     affiliation: "ZBW - Leibniz Information Centre for Economics"
+  - family-names: Majal 
+    given-names: Ghulam Mustafa
+    affiliation: "ZBW - Leibniz Information Centre for Economics"
 title: "stwfsapy (a library for matching labels of thesaurus concepts via finite-state automata)"
 abstract: "This library provides functionality to find the labels of SKOS thesaurus concepts in text. A deterministic finite automaton is constructed from the labels of the thesaurus concepts to perform the matching. In addition, a classifier is trained to score the matched concept occurrences."
-version: 0.5.0
+version: 0.5.1
 license: Apache-2.0
-date-released: 2024-08-29
+date-released: 2024-10-09
 repository-code: "https://github.com/zbw/stwfsapy"
 contact:
   - name: "Automatization of subject indexing using methods from artificial intelligence (AutoSE)"
diff --git a/poetry.lock b/poetry.lock
index fa1128a..a9f43d3 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -663,13 +663,13 @@ networkx = ["networkx (>=2.0.0,<3.0.0)"]
 
 [[package]]
 name = "requests"
-version = "2.32.0"
+version = "2.32.3"
 description = "Python HTTP for Humans."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "requests-2.32.0-py3-none-any.whl", hash = "sha256:f2c3881dddb70d056c5bd7600a4fae312b2a300e39be6a118d30b90bd27262b5"},
-    {file = "requests-2.32.0.tar.gz", hash = "sha256:fa5490319474c82ef1d2c9bc459d3652e3ae4ef4c4ebdd18a21145a47ca4b6b8"},
+    {file = "requests-2.32.3-py3-none-any.whl", hash = "sha256:70761cfe03c773ceb22aa2f671b4757976145175cdfca038c02654d061d6dcc6"},
+    {file = "requests-2.32.3.tar.gz", hash = "sha256:55365417734eb18255590a9ff9eb97e9e1da868d4ccd6402399eaf68af20a760"},
 ]
 
 [package.dependencies]
@@ -969,4 +969,4 @@ zstd = ["zstandard (>=0.18.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9,<3.13"
-content-hash = "d8b60b0839c62bec1f5ae25021efe682c26966814f39c39953ae36494ab8915c"
+content-hash = "3353deee9a043f8272d19e6a6f91d17ec6b7f905f7660af275f47f0957be44ba"
diff --git a/pyproject.toml b/pyproject.toml
index 31fd3ff..37074c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "stwfsapy"
-version = "0.5.0"
+version = "0.5.1"
 description = "A library for match labels of thesaurus concepts to text and assigning scores to found occurrences."
 authors = ["AutoSE <autose@zbw.eu>"]
 license = "Apache-2.0"
@@ -15,6 +15,7 @@ homepage = "https://github.com/zbw/stwfsapy"
 python = ">=3.9,<3.13"
 scikit-learn = ">0.24,<2.0"
 rdflib = "7.*"
+requests = "^2.32.3"
 
 
 [tool.poetry.group.dev.dependencies]