diff --git a/grin.toml b/grin.toml
index 964ffed1a..bcc327289 100644
--- a/grin.toml
+++ b/grin.toml
@@ -199,8 +199,8 @@ NUM_THREADS = 1
 # Below are advanced optional per-device tweakable params
 
 #N_TRIMS = 240
-#N_BLOCKS = 64
-#GENU_BLOCKS = 256
+#N_BLOCKS = 128
+#GENU_BLOCKS = 128
 #GENU_TPB = 8
 #GENV_STAGE1_TPB = 32
 #GENV_STAGE2_TPB = 128
@@ -210,7 +210,7 @@ NUM_THREADS = 1
 #RENAME_0_STAGE2_TPB = 64
 #RENAME_1_STAGE1_TPB = 32
 #RENAME_1_STAGE2_TPB = 128
-#TRIM_3_TPB = 64
+#TRIM_3_TPB = 32
 #RENAME_3_TPB = 8
 
 #[mining.cuckoo_miner_plugin_config.device_parameters.1]
diff --git a/pow/Cargo.toml b/pow/Cargo.toml
index 38e74f36d..6e90e235a 100644
--- a/pow/Cargo.toml
+++ b/pow/Cargo.toml
@@ -18,7 +18,7 @@ grin_util = { path = "../util" }
 
 [dependencies.cuckoo_miner]
 git = "https://github.com/mimblewimble/cuckoo-miner"
-tag = "grin_integration_21"
+tag = "grin_integration_22"
 #path = "../../cuckoo-miner"
 #uncomment this feature to turn off plugin builds
 #features=["no-plugin-build"]