diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cc0d8ca..b98035c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,6 +15,8 @@ jobs:
               uses: actions/setup-python@v5
               with:
                   python-version: ${{ matrix.python-version }}
+            - name: Install apt packages
+              run: sudo apt update && sudo apt-get install -y libgl1-mesa-glx
             - name: Install dependencies
               run: |
                   python -m pip install --upgrade pip
diff --git a/brickmos/brickify.py b/brickmos/brickify.py
index 5bd2537..d09ef02 100644
--- a/brickmos/brickify.py
+++ b/brickmos/brickify.py
@@ -166,10 +166,12 @@ def closest_color(rgb: tuple[int, int, int], color_range: list) -> BrickColor:
     """
     # Get rgb values of color while adhering to cv2 BGR representation
     r, g, b = rgb
+    r, g, b = float(r), float(g), float(b)
     # Assess euclidean distance of color to all brick colors given
     color_diffs = []
     for color in color_range:
         cr, cg, cb = color.rgb
+        cr, cg, cb = float(cr), float(cg), float(cb)
         color_diff = math.sqrt(abs(r - cr) ** 2 + abs(g - cg) ** 2 + abs(b - cb) ** 2)
         color_diffs.append((color_diff, color))
     # Get color closest to the given one and update its stats