diff --git a/.gitmodules b/.gitmodules
index 6e2339fb9..001e16c63 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -12,3 +12,8 @@
 [submodule "external/trezor-common"]
 	path = external/trezor-common
 	url = https://github.com/trezor/trezor-common.git
+[submodule "external/RandomWOW"]
+	path = external/RandomWOW
+	url = https://github.com/wownero/RandomWOW
+        branch = 1.1.6-wow
+
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c0ec0c2b8..baccf1751 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -211,7 +211,7 @@ if(NOT MANUAL_SUBMODULES)
     check_submodule(external/unbound)
     check_submodule(external/rapidjson)
     check_submodule(external/trezor-common)
-    check_submodule(external/randomx)
+    check_submodule(external/RandomWOW)
   endif()
 endif()
 
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index d51ed36c7..6549236af 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -100,4 +100,4 @@ endif()
 
 add_subdirectory(db_drivers)
 add_subdirectory(easylogging++)
-add_subdirectory(randomx EXCLUDE_FROM_ALL)
+add_subdirectory(RandomWOW EXCLUDE_FROM_ALL)
diff --git a/external/RandomWOW b/external/RandomWOW
new file mode 160000
index 000000000..ae1377c0d
--- /dev/null
+++ b/external/RandomWOW
@@ -0,0 +1 @@
+Subproject commit ae1377c0d744929ecd7ff5772574b3f758ce967c
diff --git a/external/randomx b/external/randomx
new file mode 160000
index 000000000..7567cef4c
--- /dev/null
+++ b/external/randomx
@@ -0,0 +1 @@
+Subproject commit 7567cef4c6192fb5356bbdd7db802be77be0439b
diff --git a/src/crypto/rx-slow-hash.c b/src/crypto/rx-slow-hash.c
index 606c67336..bbf6476d4 100644
--- a/src/crypto/rx-slow-hash.c
+++ b/src/crypto/rx-slow-hash.c
@@ -161,11 +161,11 @@ static void rx_initdata(randomx_cache *rs_cache, const int miners, const uint64_
     CTHR_THREAD_TYPE *st;
     si = malloc(miners * sizeof(seedinfo));
     if (si == NULL)
-      local_abort("Couldn't allocate RandomX mining threadinfo");
+      local_abort("Couldn't allocate RandomWOW mining threadinfo");
     st = malloc(miners * sizeof(CTHR_THREAD_TYPE));
     if (st == NULL) {
       free(si);
-      local_abort("Couldn't allocate RandomX mining threadlist");
+      local_abort("Couldn't allocate RandomWOW mining threadlist");
     }
     for (i=0; i<miners-1; i++) {
       si[i].si_cache = rs_cache;
@@ -225,11 +225,11 @@ void rx_slow_hash(const uint64_t mainheight, const uint64_t seedheight, const ch
     if (cache == NULL) {
       cache = randomx_alloc_cache(flags | RANDOMX_FLAG_LARGE_PAGES);
       if (cache == NULL) {
-        mdebug(RX_LOGCAT, "Couldn't use largePages for RandomX cache");
+        mdebug(RX_LOGCAT, "Couldn't use largePages for RandomWOW cache");
         cache = randomx_alloc_cache(flags);
       }
       if (cache == NULL)
-        local_abort("Couldn't allocate RandomX cache");
+        local_abort("Couldn't allocate RandomWOW cache");
     }
   }
   if (rx_sp->rs_height != seedheight || rx_sp->rs_cache == NULL || memcmp(seedhash, rx_sp->rs_hash, HASH_SIZE)) {
@@ -251,7 +251,7 @@ void rx_slow_hash(const uint64_t mainheight, const uint64_t seedheight, const ch
         if (rx_dataset == NULL) {
           rx_dataset = randomx_alloc_dataset(RANDOMX_FLAG_LARGE_PAGES);
           if (rx_dataset == NULL) {
-            mdebug(RX_LOGCAT, "Couldn't use largePages for RandomX dataset");
+            mdebug(RX_LOGCAT, "Couldn't use largePages for RandomWOW dataset");
             rx_dataset = randomx_alloc_dataset(RANDOMX_FLAG_DEFAULT);
           }
           if (rx_dataset != NULL)
@@ -264,14 +264,14 @@ void rx_slow_hash(const uint64_t mainheight, const uint64_t seedheight, const ch
         miners = 0;
         if (!rx_dataset_nomem) {
           rx_dataset_nomem = 1;
-          mwarning(RX_LOGCAT, "Couldn't allocate RandomX dataset for miner");
+          mwarning(RX_LOGCAT, "Couldn't allocate RandomWOW dataset for miner");
         }
       }
       CTHR_MUTEX_UNLOCK(rx_dataset_mutex);
     }
     rx_vm = randomx_create_vm(flags | RANDOMX_FLAG_LARGE_PAGES, rx_sp->rs_cache, rx_dataset);
     if(rx_vm == NULL) { //large pages failed
-      mdebug(RX_LOGCAT, "Couldn't use largePages for RandomX VM");
+      mdebug(RX_LOGCAT, "Couldn't use largePages for RandomWOW VM");
       rx_vm = randomx_create_vm(flags, rx_sp->rs_cache, rx_dataset);
     }
     if(rx_vm == NULL) {//fallback if everything fails
@@ -279,7 +279,7 @@ void rx_slow_hash(const uint64_t mainheight, const uint64_t seedheight, const ch
       rx_vm = randomx_create_vm(flags, rx_sp->rs_cache, rx_dataset);
     }
     if (rx_vm == NULL)
-      local_abort("Couldn't allocate RandomX VM");
+      local_abort("Couldn't allocate RandomWOW VM");
   } else if (miners) {
     CTHR_MUTEX_LOCK(rx_dataset_mutex);
     if (rx_dataset != NULL && rx_dataset_height != seedheight)
diff --git a/src/cryptonote_core/cryptonote_tx_utils.cpp b/src/cryptonote_core/cryptonote_tx_utils.cpp
index f662028ff..b41f2793f 100644
--- a/src/cryptonote_core/cryptonote_tx_utils.cpp
+++ b/src/cryptonote_core/cryptonote_tx_utils.cpp
@@ -680,13 +680,6 @@ namespace cryptonote
 
   bool get_block_longhash(const Blockchain *pbc, const block& b, crypto::hash& res, const uint64_t height, const int miners)
   {
-    // block 202612 bug workaround
-    if (height == 202612)
-    {
-      static const std::string longhash_202612 = "84f64766475d51837ac9efbef1926486e58563c95a19fef4aec3254f03000000";
-      epee::string_tools::hex_to_pod(longhash_202612, res);
-      return true;
-    }
     blobdata bd = get_block_hashing_blob(b);
     if (b.major_version >= RX_BLOCK_VERSION)
     {
@@ -705,7 +698,7 @@ namespace cryptonote
       }
       rx_slow_hash(main_height, seed_height, hash.data, bd.data(), bd.size(), res.data, miners, 0);
     } else {
-      const int pow_variant = b.major_version >= 7 ? b.major_version - 6 : 0;
+      const int pow_variant = b.major_version >= 13 ? 6 : b.major_version >= 11 && b.major_version <= 12 ? 4 : 2;
       crypto::cn_slow_hash(bd.data(), bd.size(), res, pow_variant, height);
     }
     return true;