diff --git a/.changeset/clear-astral-ranges.md b/.changeset/clear-astral-ranges.md
new file mode 100644
index 000000000..4675cd119
--- /dev/null
+++ b/.changeset/clear-astral-ranges.md
@@ -0,0 +1,5 @@
+---
+"fast-check": patch
+---
+
+🐛 Shrink Unicode regex character ranges using complete code points
diff --git a/packages/fast-check/src/arbitrary/stringMatching.ts b/packages/fast-check/src/arbitrary/stringMatching.ts
index 6c1af7e1d..0f65c1a37 100644
--- a/packages/fast-check/src/arbitrary/stringMatching.ts
+++ b/packages/fast-check/src/arbitrary/stringMatching.ts
@@ -179,7 +179,7 @@ function toMatchingArbitrary(
           if (typeof c !== 'string') throw new Error('Invalid type');
           if ([...c].length !== 1) throw new Error('Invalid length');
           // oxlint-disable-next-line typescript/no-non-null-assertion
-          return c.charCodeAt(0)!;
+          return c.codePointAt(0)!;
         },
       );
     }