diff --git a/.dependencies.json b/.dependencies.json
index 042158847..b965cfb1a 100644
--- a/.dependencies.json
+++ b/.dependencies.json
@@ -17,7 +17,7 @@
     "simplexnoise": "83b576feea873a9ab4f2d3bb5da394c0b0b18e7f",
     "flextgl": "bc3d4da8fc087cba17d64e9d908ae35b7e40f4fe",
     "libvxl": "2d482be6e738f0befdbb4f63d740c51eef9970a3",
-    "meshoptimizer": "331f1cebfa08bfcb06521ea587336a870a04955a",
+    "meshoptimizer": "568b628e52f5c383e9f8aa7cbb3f0df666bfbca4",
     "yocto-gl": "7e35c631b5ee29f1a7ee1010c5dcf0879aa3dcf3",
     "ufbx": "6af38bda840a1741faa203a2f952e6877f2b4d6f",
     "natsort": "cdd8df9602e727482ae5e051cff74b7ec7ffa07a",
diff --git a/contrib/libs/meshoptimizer/meshoptimizer.h b/contrib/libs/meshoptimizer/meshoptimizer.h
index 3056d9c39..baeba1522 100644
--- a/contrib/libs/meshoptimizer/meshoptimizer.h
+++ b/contrib/libs/meshoptimizer/meshoptimizer.h
@@ -608,6 +608,27 @@ MESHOPTIMIZER_API void meshopt_spatialSortRemap(unsigned int* destination, const
  */
 MESHOPTIMIZER_EXPERIMENTAL void meshopt_spatialSortTriangles(unsigned int* destination, const unsigned int* indices, size_t index_count, const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride);
 
+/**
+ * Quantize a float into half-precision (as defined by IEEE-754 fp16) floating point value
+ * Generates +-inf for overflow, preserves NaN, flushes denormals to zero, rounds to nearest
+ * Representable magnitude range: [6e-5; 65504]
+ * Maximum relative reconstruction error: 5e-4
+ */
+MESHOPTIMIZER_API unsigned short meshopt_quantizeHalf(float v);
+
+/**
+ * Quantize a float into a floating point value with a limited number of significant mantissa bits, preserving the IEEE-754 fp32 binary representation
+ * Generates +-inf for overflow, preserves NaN, flushes denormals to zero, rounds to nearest
+ * Assumes N is in a valid mantissa precision range, which is 1..23
+ */
+MESHOPTIMIZER_API float meshopt_quantizeFloat(float v, int N);
+
+/**
+ * Reverse quantization of a half-precision (as defined by IEEE-754 fp16) floating point value
+ * Preserves Inf/NaN, flushes denormals to zero
+ */
+MESHOPTIMIZER_API float meshopt_dequantizeHalf(unsigned short h);
+
 /**
  * Set allocation callbacks
  * These callbacks will be used instead of the default operator new/operator delete for all temporary allocations in the library.
@@ -620,7 +641,7 @@ MESHOPTIMIZER_API void meshopt_setAllocator(void* (MESHOPTIMIZER_ALLOC_CALLCONV*
 } /* extern "C" */
 #endif
 
-/* Quantization into commonly supported data formats */
+/* Quantization into fixed point normalized formats; these are only available as inline C++ functions */
 #ifdef __cplusplus
 /**
  * Quantize a float in [0..1] range into an N-bit fixed point unorm value
@@ -635,27 +656,6 @@ inline int meshopt_quantizeUnorm(float v, int N);
  * Maximum reconstruction error: 1/2^N
  */
 inline int meshopt_quantizeSnorm(float v, int N);
-
-/**
- * Quantize a float into half-precision (as defined by IEEE-754 fp16) floating point value
- * Generates +-inf for overflow, preserves NaN, flushes denormals to zero, rounds to nearest
- * Representable magnitude range: [6e-5; 65504]
- * Maximum relative reconstruction error: 5e-4
- */
-MESHOPTIMIZER_API unsigned short meshopt_quantizeHalf(float v);
-
-/**
- * Quantize a float into a floating point value with a limited number of significant mantissa bits, preserving the IEEE-754 fp32 binary representation
- * Generates +-inf for overflow, preserves NaN, flushes denormals to zero, rounds to nearest
- * Assumes N is in a valid mantissa precision range, which is 1..23
- */
-MESHOPTIMIZER_API float meshopt_quantizeFloat(float v, int N);
-
-/**
- * Reverse quantization of a half-precision (as defined by IEEE-754 fp16) floating point value
- * Preserves Inf/NaN, flushes denormals to zero
- */
-MESHOPTIMIZER_API float meshopt_dequantizeHalf(unsigned short h);
 #endif
 
 /**