diff --git a/docker/static_analysis.dockerfile b/docker/static_analysis.dockerfile
index 12b9463..dd36a7f 100644
--- a/docker/static_analysis.dockerfile
+++ b/docker/static_analysis.dockerfile
@@ -1,34 +1,30 @@
-FROM ubuntu:22.10 as base
+FROM ubuntu:23.04 as base
 
+# Define versions as environment variables
+ENV CLANG_VERSION=16
+ENV CPPCHECK_VERSION=2.12.0
+
+# Other environment variables
 ENV CXX=clang++
 ENV CC=clang
-
 ENV DEBIAN_FRONTEND=noninteractive
 
-RUN apt-get update && apt-get install -y build-essential \
-    python3 python3-pip git clang-15 clang-tidy-15 wget libssl-dev ninja-build && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
-RUN pip3 install PyGithub
-
-RUN ln -s \
-    "$(which clang++-15)" \
-    /usr/bin/clang++
-
-RUN ln -s \
-    "$(which clang-15)" \
-    /usr/bin/clang
-
-RUN ln -s \
-    /usr/bin/python3 \
-    /usr/bin/python
-
-RUN git clone https://github.com/Kitware/CMake.git && \
-    cd CMake && ./bootstrap && \
-    make -j4 && make install
-
-RUN wget 'https://sourceforge.net/projects/cppcheck/files/cppcheck/2.9/cppcheck-2.9.tar.gz/download' && \
-    tar xf download && \
-    cd cppcheck-2.9 && mkdir build && cd build && \
-    cmake -G "Ninja" .. && ninja install
-
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+        build-essential python3 python3-pip git clang-$CLANG_VERSION clang-tidy-$CLANG_VERSION wget libssl-dev ninja-build \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* \
+    && pip3 install PyGithub --break-system-packages \
+    && ln -s "$(which clang++-$CLANG_VERSION)" /usr/bin/clang++ \
+    && ln -s "$(which clang-$CLANG_VERSION)" /usr/bin/clang \
+    && ln -s /usr/bin/python3 /usr/bin/python
+
+WORKDIR /opt
+
+# Build CMake from source
+RUN git clone https://github.com/Kitware/CMake.git \
+    && cd CMake && ./bootstrap && make -j4 && make install
+
+# Install cppcheck
+RUN git clone https://github.com/danmar/cppcheck.git \
+    && cd cppcheck && git checkout tags/$CPPCHECK_VERSION && mkdir build && cd build && cmake -G Ninja .. && ninja all && ninja install
diff --git a/entrypoint.sh b/entrypoint.sh
index 85ad79c..850995d 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -53,6 +53,16 @@ if [ "$GITHUB_EVENT_NAME" = "pull_request_target" ] && [ -n "$INPUT_PR_REPO" ];
     export GITHUB_WORKSPACE=$(pwd)
 fi
 
+preselected_files=""
+if [ "$INPUT_REPORT_PR_CHANGES_ONLY" = true ]; then
+    echo "The 'report_pr_changes_only' option is enabled. Running SA only on modified files."
+    git config --global --add safe.directory /github/workspace
+    git fetch origin
+    common_ancestor=$(git merge-base origin/"$GITHUB_BASE_REF" "origin/$GITHUB_HEAD_REF")
+    preselected_files="$(git diff --name-only "$common_ancestor" "origin/$GITHUB_HEAD_REF" | grep -E '\.(c|cpp|h|hpp)$')"
+    debug_print "Preselected files: \n$preselected_files"
+fi
+
 debug_print "GITHUB_WORKSPACE = ${GITHUB_WORKSPACE} INPUT_EXCLUDE_DIR = ${INPUT_EXCLUDE_DIR} use_extra_directory = ${use_extra_directory}"
 
 mkdir -p build
@@ -67,15 +77,18 @@ fi
 cd build
 
 if [ "$INPUT_USE_CMAKE" = true ]; then
-    cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON "$INPUT_CMAKE_ARGS" ..
+    # Trim trailing newlines
+    INPUT_CMAKE_ARGS="${INPUT_CMAKE_ARGS%"${INPUT_CMAKE_ARGS##*[![:space:]]}"}"
+    debug_print "Running cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON $INPUT_CMAKE_ARGS -S $GITHUB_WORKSPACE -B $(pwd)"
+    eval "cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON $INPUT_CMAKE_ARGS -S $GITHUB_WORKSPACE -B $(pwd)"
 fi
 
 if [ -z "$INPUT_EXCLUDE_DIR" ]; then
-    files_to_check=$(python3 /get_files_to_check.py -dir="$GITHUB_WORKSPACE")
-    debug_print "Running: files_to_check=python3 /get_files_to_check.py -dir=\"$GITHUB_WORKSPACE\")"
+    files_to_check=$(python3 /get_files_to_check.py -dir="$GITHUB_WORKSPACE" -preselected="$preselected_files")
+    debug_print "Running: files_to_check=python3 /get_files_to_check.py -dir=\"$GITHUB_WORKSPACE\" -preselected=\"$preselected_files\")"
 else
-    files_to_check=$(python3 /get_files_to_check.py -exclude="$GITHUB_WORKSPACE/$INPUT_EXCLUDE_DIR" -dir="$GITHUB_WORKSPACE")
-    debug_print "Running: files_to_check=python3 /get_files_to_check.py -exclude=\"$GITHUB_WORKSPACE/$INPUT_EXCLUDE_DIR\" -dir=\"$GITHUB_WORKSPACE\")"
+    files_to_check=$(python3 /get_files_to_check.py -exclude="$GITHUB_WORKSPACE/$INPUT_EXCLUDE_DIR" -dir="$GITHUB_WORKSPACE" -preselected="$preselected_files")
+    debug_print "Running: files_to_check=python3 /get_files_to_check.py -exclude=\"$GITHUB_WORKSPACE/$INPUT_EXCLUDE_DIR\" -dir=\"$GITHUB_WORKSPACE\" -preselected=\"$preselected_files\")"
 fi
 
 debug_print "Files to check = $files_to_check"
@@ -90,14 +103,18 @@ if [ "$INPUT_USE_CMAKE" = true ]; then
         debug_print "Running cppcheck --project=compile_commands.json $INPUT_CPPCHECK_ARGS --output-file=cppcheck.txt -i$GITHUB_WORKSPACE/$INPUT_EXCLUDE_DIR ..."
         eval cppcheck --project=compile_commands.json "$INPUT_CPPCHECK_ARGS" --output-file=cppcheck.txt -i"$GITHUB_WORKSPACE/$INPUT_EXCLUDE_DIR" "$GITHUB_WORKSPACE" || true
     fi
+
+    # Excludes for clang-tidy are handled in python script
+    debug_print "Running run-clang-tidy-16 $INPUT_CLANG_TIDY_ARGS -p $(pwd) $files_to_check >>clang_tidy.txt 2>&1"
+    eval run-clang-tidy-16 "$INPUT_CLANG_TIDY_ARGS" -p "$(pwd)" "$files_to_check" >clang_tidy.txt 2>&1 || true
+
 else
     # Excludes for clang-tidy are handled in python script
     debug_print "Running cppcheck $files_to_check $INPUT_CPPCHECK_ARGS --output-file=cppcheck.txt ..."
     eval cppcheck "$files_to_check" "$INPUT_CPPCHECK_ARGS" --output-file=cppcheck.txt || true
-fi
 
-# Excludes for clang-tidy are handled in python script
-debug_print "Running run-clang-tidy-15 $INPUT_CLANG_TIDY_ARGS -p $(pwd) $files_to_check >>clang_tidy.txt 2>&1"
-eval run-clang-tidy-15 "$INPUT_CLANG_TIDY_ARGS" -p "$(pwd)" "$files_to_check" >clang_tidy.txt 2>&1 || true
+    debug_print "Running run-clang-tidy-16 $INPUT_CLANG_TIDY_ARGS $files_to_check >>clang_tidy.txt 2>&1"
+    eval run-clang-tidy-16 "$INPUT_CLANG_TIDY_ARGS" "$files_to_check" >clang_tidy.txt 2>&1 || true
+fi
 
 python3 /run_static_analysis.py -cc cppcheck.txt -ct clang_tidy.txt -o "$print_to_console" -fk "$use_extra_directory"
diff --git a/src/get_files_to_check.py b/src/get_files_to_check.py
index d4af089..3cf8f45 100644
--- a/src/get_files_to_check.py
+++ b/src/get_files_to_check.py
@@ -2,7 +2,7 @@
 from pathlib import Path
 
 
-def get_files_to_check(directory_in, excludes_in):
+def get_files_to_check(directory_in, excludes_in, preselected_files):
     """
     Given a directory path and a string of prefixes to exclude,
     return a space-separated string of all files in the directory (and its subdirectories)
@@ -11,6 +11,7 @@ def get_files_to_check(directory_in, excludes_in):
     Args:
         directory_in (str): The path to the directory to search for files.
         excludes_in (str): A space-separated string of prefixes to exclude from the search.
+        preselected_files (str): If present, then it's the list of files to be checked (minus excluded ones)
 
     Returns:
         str: A space-separated string of file paths that meet the search criteria.
@@ -26,12 +27,19 @@ def get_files_to_check(directory_in, excludes_in):
     supported_extensions = (".h", ".hpp", ".hcc", ".c", ".cc", ".cpp", ".cxx")
     all_files = []
 
-    for path in Path(directory_in).rglob("*.*"):
-        path_ = str(path.resolve())
-        if path_.endswith(supported_extensions) and not path_.startswith(
-            tuple(exclude_prefixes)
-        ):
-            all_files.append(path_)
+    if len(preselected_files) == 0:
+        for path in Path(directory_in).rglob("*.*"):
+            path_ = str(path.resolve())
+            if path_.endswith(supported_extensions) and not path_.startswith(
+                tuple(exclude_prefixes)
+            ):
+                all_files.append(path_)
+    else:
+        for file in preselected_files:
+            if not file.startswith(directory_in):
+                file = f"{directory_in}/{file}"
+            if not file.startswith(tuple(exclude_prefixes)):
+                all_files.append(file)
 
     return " ".join(all_files)
 
@@ -39,9 +47,13 @@ def get_files_to_check(directory_in, excludes_in):
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     parser.add_argument("-exclude", help="Exclude prefix", required=False)
-    parser.add_argument("-dir", help="Current directory", required=True)
+    parser.add_argument(
+        "-preselected", help="Preselected files", default="", required=False
+    )
+    parser.add_argument("-dir", help="Source directory", required=True)
 
     directory = parser.parse_args().dir
+    preselected = parser.parse_args().preselected
     excludes = parser.parse_args().exclude
 
-    print(get_files_to_check(directory, excludes))
+    print(get_files_to_check(directory, excludes, preselected.split()))
diff --git a/test/test_static_analysis.py b/test/test_static_analysis.py
index a0926ea..991d4a5 100644
--- a/test/test_static_analysis.py
+++ b/test/test_static_analysis.py
@@ -185,7 +185,7 @@ def test_get_files_to_check(self):
             f"{pwd}/utils/dummy_project/exclude_dir_2/ExcludedFile2.hpp",
         ]
         result = get_files_to_check.get_files_to_check(
-            f"{pwd}/utils/dummy_project", None
+            f"{pwd}/utils/dummy_project", None, ""
         )
 
         self.assertEqual(to_list_and_sort(result), expected)
@@ -197,7 +197,7 @@ def test_get_files_to_check(self):
             f"{pwd}/utils/dummy_project/exclude_dir_2/ExcludedFile2.hpp",
         ]
         result = get_files_to_check.get_files_to_check(
-            f"{pwd}/utils/dummy_project", f"{pwd}/utils/dummy_project/exclude_dir_1"
+            f"{pwd}/utils/dummy_project", f"{pwd}/utils/dummy_project/exclude_dir_1", ""
         )
 
         self.assertEqual(to_list_and_sort(result), expected)
@@ -210,6 +210,15 @@ def test_get_files_to_check(self):
         result = get_files_to_check.get_files_to_check(
             f"{pwd}/utils/dummy_project",
             f"{pwd}/utils/dummy_project/exclude_dir_1 {pwd}/utils/dummy_project/exclude_dir_2",
+            "",
+        )
+
+        # Preselected files present
+        expected = [f"{pwd}/utils/dummy_project/DummyFile.cpp"]
+        result = get_files_to_check.get_files_to_check(
+            f"{pwd}/utils/dummy_project",
+            f"{pwd}/utils/dummy_project/exclude_dir_1 {pwd}/utils/dummy_project/exclude_dir_2",
+            f"{pwd}/utils/dummy_project/DummyFile.cpp {pwd}/utils/dummy_project/exclude_dir_1/ExcludedFile1.hpp",
         )