diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ef6fefb..d883bd8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,6 +25,8 @@ jobs:
         uses: Swatinem/rust-cache@v2
       - name: Check function count badge
         run: python3 docs/generate_count_badge.py --check
+      - name: Check version in docs
+        run: python3 docs/add_version_to_docs.py --check
       - name: Check formatting
         run: cargo fmt --check
       - name: Clippy
diff --git a/docs/add_version_to_docs.py b/docs/add_version_to_docs.py
new file mode 100644
index 0000000..60f5b0d
--- /dev/null
+++ b/docs/add_version_to_docs.py
@@ -0,0 +1,84 @@
+import os
+import re
+import sys
+from datetime import datetime
+
+
+def main():
+    with open("Cargo.toml", "r") as f:
+        cargo_text = f.read()
+
+        m = re.search(r'leptos = "([^"]+)"', cargo_text)
+        leptos_version = m.group(1)
+
+        m = re.search(r'version = "(\d+)\.(\d+)\.(\d+)"', cargo_text)
+        crate_version_short = f"{m.group(1)}.{m.group(2)}"
+        crate_version_long = f"{m.group(1)}.{m.group(2)}.{m.group(3)}"
+
+    print("Found crate version", crate_version_short, "and leptos version", leptos_version)
+
+    with open("README.md", "r") as f:
+        original_text = f.read()
+
+        text = add_to_compat_table(leptos_version, crate_version_short, original_text)
+
+        if len(sys.argv) > 1 and sys.argv[1] == "--check":
+            if original_text != text:
+                print("[Failed] README.md doesn't contain the current crate version in the compatibility table",
+                      file=sys.stderr)
+                print("  * Run `python3 docs/add_version_to_docs.py` to fix", file=sys.stderr)
+                quit(1)
+            else:
+                print("[OK] README.md does contain the current crate version in the compatibility table")
+
+    if len(sys.argv) == 1:
+        with open("README.md", "w") as f:
+            f.write(text)
+
+    with open("CHANGELOG.md", "r") as f:
+        original_text = f.read()
+
+        text = replace_in_changelog(crate_version_long, original_text)
+
+        if len(sys.argv) > 1 and sys.argv[1] == "--check":
+            if original_text != text:
+                print("[Failed] CHANGELOG.md still contains an [Unreleased] header",
+                      file=sys.stderr)
+                print("  * Run `python3 docs/add_version_to_docs.py` to fix", file=sys.stderr)
+                quit(1)
+            else:
+                print("[OK] CHANGELOG.md doesn't contain an [Unreleased] header")
+
+    if len(sys.argv) == 1:
+        with open("CHANGELOG.md", "w") as f:
+            f.write(text)
+
+
+def add_to_compat_table(leptos_version: str, crate_version: str, original_text: str):
+    lines = original_text.splitlines()
+
+    table_row = None
+
+    if re.search(rf"^\|[^|]+\| {leptos_version}", lines[-1]) is not None:
+        table_row = lines[-1]
+
+    if table_row is None:
+        lines.append(f"| {crate_version} | {leptos_version} |")
+    elif re.search(rf"^\| .*? {crate_version}\s*\| {leptos_version}", table_row) is not None:
+        return original_text
+    else:
+        index = table_row.index("|", 1)
+        while index > 2 and table_row[index - 1] == " ":
+            index -= 1
+        lines[-1] = f"{table_row[:index]}, {crate_version}{table_row[index:]}"
+
+    return "\n".join(lines) + '\n'
+
+
+def replace_in_changelog(crate_version: str, original_text: str):
+    today = datetime.today().strftime("%Y-%m-%d")
+    return original_text.replace("## [Unreleased] -", f"## [{crate_version}] - {today}")
+
+
+if __name__ == '__main__':
+    main()