diff --git a/.github/renovate.json b/.github/renovate.json
new file mode 100644
index 00000000000..d1d82433553
--- /dev/null
+++ b/.github/renovate.json
@@ -0,0 +1,17 @@
+{
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "extends": [
+        "config:base"
+    ],
+    "labels": [
+        "Dependency"
+    ],
+    "packageRules": [
+        {
+            "groupName": "github-actions",
+            "matchManagers": ["github-actions"],
+            "separateMajorMinor": "false"
+        }
+    ],
+    "schedule": ["on the 3rd day of the month"]
+}
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index eeb4b391ee3..f81bcb956fa 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -40,6 +40,7 @@ repos:
     rev: v4.3.0
     hooks:
       - id: check-merge-conflict
+      - id: check-json
       - id: check-yaml
 
   - repo: https://github.com/sphinx-contrib/sphinx-lint
diff --git a/MANIFEST.in b/MANIFEST.in
index 26f9401f2d9..08f6dfc0877 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -25,6 +25,7 @@ exclude .coveragerc
 exclude .editorconfig
 exclude .readthedocs.yml
 exclude codecov.yml
+exclude renovate.json
 global-exclude .git*
 global-exclude *.pyc
 global-exclude *.so
diff --git a/README.md b/README.md
index 5e9adaf7e95..e7c0ebc5aa5 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,9 @@ As of 2019, Pillow development is
             <a href="https://pypi.org/project/Pillow/"><img
                 alt="Number of PyPI downloads"
                 src="https://img.shields.io/pypi/dm/pillow.svg"></a>
+            <a href="https://bestpractices.coreinfrastructure.org/projects/6331"><img
+                alt="OpenSSF Best Practices"
+                src="https://bestpractices.coreinfrastructure.org/projects/6331/badge"></a>
         </td>
     </tr>
     <tr>
diff --git a/Tests/test_file_gif.py b/Tests/test_file_gif.py
index 68cb8a36e8d..4e967faec91 100644
--- a/Tests/test_file_gif.py
+++ b/Tests/test_file_gif.py
@@ -1087,6 +1087,19 @@ def test_palette_save_P(tmp_path):
         assert_image_equal(reloaded, im)
 
 
+def test_palette_save_duplicate_entries(tmp_path):
+    im = Image.new("P", (1, 2))
+    im.putpixel((0, 1), 1)
+
+    im.putpalette((0, 0, 0, 0, 0, 0))
+
+    out = str(tmp_path / "temp.gif")
+    im.save(out, palette=[0, 0, 0, 0, 0, 0, 1, 1, 1])
+
+    with Image.open(out) as reloaded:
+        assert reloaded.convert("RGB").getpixel((0, 1)) == (0, 0, 0)
+
+
 def test_palette_save_all_P(tmp_path):
     frames = []
     colors = ((255, 0, 0), (0, 255, 0))
diff --git a/Tests/test_image.py b/Tests/test_image.py
index 7cebed127d9..ab945e946f0 100644
--- a/Tests/test_image.py
+++ b/Tests/test_image.py
@@ -620,6 +620,7 @@ def test_remap_palette_transparency(self):
 
         im_remapped = im.remap_palette([1, 0])
         assert im_remapped.info["transparency"] == 1
+        assert len(im_remapped.getpalette()) == 6
 
         # Test unused transparency
         im.info["transparency"] = 2
diff --git a/Tests/test_imageops.py b/Tests/test_imageops.py
index 1051d9843cf..c9b2fd865b8 100644
--- a/Tests/test_imageops.py
+++ b/Tests/test_imageops.py
@@ -110,6 +110,16 @@ def test_contain(new_size):
     assert new_im.size == (256, 256)
 
 
+def test_contain_round():
+    im = Image.new("1", (43, 63), 1)
+    new_im = ImageOps.contain(im, (5, 7))
+    assert new_im.width == 5
+
+    im = Image.new("1", (63, 43), 1)
+    new_im = ImageOps.contain(im, (7, 5))
+    assert new_im.height == 5
+
+
 def test_pad():
     # Same ratio
     im = hopper()
@@ -130,6 +140,15 @@ def test_pad():
             )
 
 
+def test_pad_round():
+    im = Image.new("1", (1, 1), 1)
+    new_im = ImageOps.pad(im, (4, 1))
+    assert new_im.load()[2, 0] == 1
+
+    new_im = ImageOps.pad(im, (1, 4))
+    assert new_im.load()[0, 2] == 1
+
+
 @pytest.mark.parametrize("mode", ("P", "PA"))
 def test_palette(mode):
     im = hopper(mode)
diff --git a/docs/index.rst b/docs/index.rst
index c731e274600..45af4c5714c 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -69,6 +69,10 @@ Pillow for enterprise is available via the Tidelift Subscription. `Learn more <h
    :target: https://pypi.org/project/Pillow/
    :alt: Number of PyPI downloads
 
+.. image:: https://bestpractices.coreinfrastructure.org/projects/6331/badge
+   :target: https://bestpractices.coreinfrastructure.org/projects/6331
+   :alt: OpenSSF Best Practices
+
 Overview
 ========
 
diff --git a/src/PIL/GifImagePlugin.py b/src/PIL/GifImagePlugin.py
index 2e11df54c0a..20435fe313a 100644
--- a/src/PIL/GifImagePlugin.py
+++ b/src/PIL/GifImagePlugin.py
@@ -519,9 +519,8 @@ def _normalize_palette(im, palette, info):
         used_palette_colors = []
         for i in range(0, len(source_palette), 3):
             source_color = tuple(source_palette[i : i + 3])
-            try:
-                index = im.palette.colors[source_color]
-            except KeyError:
+            index = im.palette.colors.get(source_color)
+            if index in used_palette_colors:
                 index = None
             used_palette_colors.append(index)
         for i, index in enumerate(used_palette_colors):
diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index d2819e07662..6611ceb3c7e 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -1949,11 +1949,7 @@ def remap_palette(self, dest_map, source_palette=None):
 
         m_im = m_im.convert("L")
 
-        # Internally, we require 256 palette entries.
-        new_palette_bytes = (
-            palette_bytes + ((256 * bands) - len(palette_bytes)) * b"\x00"
-        )
-        m_im.putpalette(new_palette_bytes, palette_mode)
+        m_im.putpalette(palette_bytes, palette_mode)
         m_im.palette = ImagePalette.ImagePalette(palette_mode, palette=palette_bytes)
 
         if "transparency" in self.info:
diff --git a/src/PIL/ImageOps.py b/src/PIL/ImageOps.py
index 57a032c9442..443c540b61a 100644
--- a/src/PIL/ImageOps.py
+++ b/src/PIL/ImageOps.py
@@ -255,11 +255,11 @@ def contain(image, size, method=Image.Resampling.BICUBIC):
 
     if im_ratio != dest_ratio:
         if im_ratio > dest_ratio:
-            new_height = int(image.height / image.width * size[0])
+            new_height = round(image.height / image.width * size[0])
             if new_height != size[1]:
                 size = (size[0], new_height)
         else:
-            new_width = int(image.width / image.height * size[1])
+            new_width = round(image.width / image.height * size[1])
             if new_width != size[0]:
                 size = (new_width, size[1])
     return image.resize(size, resample=method)
@@ -294,10 +294,10 @@ def pad(image, size, method=Image.Resampling.BICUBIC, color=None, centering=(0.5
         if resized.palette:
             out.putpalette(resized.getpalette())
         if resized.width != size[0]:
-            x = int((size[0] - resized.width) * max(0, min(centering[0], 1)))
+            x = round((size[0] - resized.width) * max(0, min(centering[0], 1)))
             out.paste(resized, (x, 0))
         else:
-            y = int((size[1] - resized.height) * max(0, min(centering[1], 1)))
+            y = round((size[1] - resized.height) * max(0, min(centering[1], 1)))
             out.paste(resized, (0, y))
     return out