diff --git a/.github/workflows/clang_format_check.yaml b/.github/workflows/clang_format_check.yaml
index b49de1b7d..ee2309c17 100644
--- a/.github/workflows/clang_format_check.yaml
+++ b/.github/workflows/clang_format_check.yaml
@@ -4,7 +4,7 @@ on: [pull_request, push]
 jobs:
   build:
     name: clang-format-check
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
 
     # Run on external PRs, but not internal PRs as they'll be run by the push
     if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
diff --git a/.github/workflows/coverage_test.yaml b/.github/workflows/coverage_test.yaml
index 5f8ea888f..ea97f93c9 100644
--- a/.github/workflows/coverage_test.yaml
+++ b/.github/workflows/coverage_test.yaml
@@ -8,7 +8,7 @@ env:
 jobs:
   build:
     name: coverage-test
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     # Run on external PRs, but not internal PRs as they'll be run by the push
     if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
diff --git a/.github/workflows/docstring_check.yaml b/.github/workflows/docstring_check.yaml
index 12cc05981..3290ba06b 100644
--- a/.github/workflows/docstring_check.yaml
+++ b/.github/workflows/docstring_check.yaml
@@ -4,18 +4,25 @@ on: [pull_request, push]
 jobs:
   build:
     name: docstring-check
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
 
     # Run on external PRs, but not internal PRs as they'll be run by the push
     if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
 
     steps:
-      - name: Fetch repository
+      - name: Checkout repository
         uses: actions/checkout@v3
         with:
-          submodules: recursive
-      - name: Install packages
-        run: sudo apt-get update && sudo apt-get install build-essential libhdf5-dev python3-venv libclang1-9
+          submodules: 'true'
+
+      - name: Setup python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+
+      - name: Install packages on Linux
+        run: sudo apt-get update && sudo apt-get install build-essential libhdf5-dev
+
       - name: Check docstrings
         run: |
           export LIBCLANG_PATH=/usr/lib/x86_64-linux-gnu/libclang-9.so.1
diff --git a/.github/workflows/publish-sdist-wheels.yml b/.github/workflows/publish-sdist-wheels.yml
index 9271fc619..5114cac2f 100644
--- a/.github/workflows/publish-sdist-wheels.yml
+++ b/.github/workflows/publish-sdist-wheels.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, macos-11, windows-2022]
+        os: [ubuntu-latest, macos-11, windows-2022]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/src/readers/morphologySWC.cpp b/src/readers/morphologySWC.cpp
index 9d8d0e434..d4a79e3cf 100644
--- a/src/readers/morphologySWC.cpp
+++ b/src/readers/morphologySWC.cpp
@@ -1,6 +1,8 @@
 #include "morphologySWC.h"
 
 #include <cstdint>        // uint32_t
+#include <cstdio>         // sscanf
+#include <locale>         // std::locale
 #include <memory>         // std::shared_ptr
 #include <sstream>        // std::stringstream
 #include <string>         // std::string
@@ -29,6 +31,9 @@ morphio::readers::Sample readSample(const char* line, unsigned int lineNumber_)
     morphio::floatType radius = -1.;
     int int_type = -1;
     morphio::readers::Sample sample;
+
+    // Set local to classic in order to ensure that dots are recognized as decimal points by sscanf
+    std::locale prev_locale = std::locale::global(std::locale::classic());
     sample.valid = sscanf(line,
                           format,
                           &sample.id,
@@ -39,6 +44,9 @@ morphio::readers::Sample readSample(const char* line, unsigned int lineNumber_)
                           &radius,
                           &sample.parentId) == 7;
 
+    // Restore locale
+    std::locale::global(prev_locale);
+
     sample.type = static_cast<morphio::SectionType>(int_type);
     sample.diameter = radius * 2;  // The point array stores diameters.
     sample.lineNumber = lineNumber_;