diff --git a/platform/mellanox/mlnx-sai.mk b/platform/mellanox/mlnx-sai.mk
index fbf4f94b59..d9ee588a0d 100644
--- a/platform/mellanox/mlnx-sai.mk
+++ b/platform/mellanox/mlnx-sai.mk
@@ -1,7 +1,7 @@
 # Mellanox SAI
 
-MLNX_SAI_VERSION = SAIRel1.8.2-master
-MLNX_SAI_REVISION = 6b094746adc7ef2321701b4868806bc54a95bbd1
+MLNX_SAI_VERSION = sonic1.9.1fixes-master
+MLNX_SAI_REVISION = 4ebc01e95b754c56da7f8b5fb45b82fbe661d05a
 
 export MLNX_SAI_VERSION MLNX_SAI_REVISION
 
diff --git a/platform/mellanox/sdk.mk b/platform/mellanox/sdk.mk
index 56e3145945..7c517627c2 100644
--- a/platform/mellanox/sdk.mk
+++ b/platform/mellanox/sdk.mk
@@ -1,5 +1,5 @@
-MLNX_SDK_BASE_URL = https://github.com/Mellanox/SAI-Implementation/raw/sonicv1.0.2/sdk
-MLNX_SDK_VERSION = 4.2.5008
+MLNX_SDK_BASE_URL = https://github.com/Mellanox/SAI-Implementation/raw/4ebc01e95b754c56da7f8b5fb45b82fbe661d05a/sdk
+MLNX_SDK_VERSION = 4.2.5010
 MLNX_SDK_RDEBS += $(APPLIBS) $(IPROUTE2) $(SX_ACL_RM) $(SX_COMPLIB) \
 		  $(SX_EXAMPLES) $(SX_GEN_UTILS) $(SX_SCEW) $(SX_SDN_HAL) \
 		  $(SXD_LIBS) $(TESTX)