diff --git a/CMakeLists.txt b/CMakeLists.txt
index 97ccee6ad..0a3f79f9b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1117,7 +1117,8 @@ elseif(CMAKE_SYSTEM_NAME MATCHES "(SunOS|Solaris)")
   set(EXTRA_LIBRARIES socket nsl resolv)
 elseif(NOT MSVC AND NOT DEPENDS)
   find_library(RT rt)
-  set(EXTRA_LIBRARIES ${RT})
+  find_library(Z z)
+  set(EXTRA_LIBRARIES ${RT} ${Z})
 endif()
 
 list(APPEND EXTRA_LIBRARIES ${CMAKE_DL_LIBS})
diff --git a/README.md b/README.md
index 98139b5d5..7daaba57e 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ Dates are provided in the format YYYY-MM-DD.
 | -                             | 2020-06-28 | Hallucinogenic Hypnotoad  | v0.8.0.0                | v0.8.0.2                    | Dandelion++ support
 | 253,999                       | 2020-10-09 | Illiterate Illuminati  | v0.9.0.0                | v0.9.3.3                    | Dynamic coinbase unlock (up to 1 mo.), Deterministic unlock times, Enforce maximum coinbase amount, show_qr_code wallet command, CLSAG
 | 331,170                       | 2021-07-04 | Junkie Jeff  | v0.10.0.0               | v0.10.2.0                   | Bulletproofs+, Miner Block Header Signing, Vote by Block, Change coinbase unlock time to 1 day, Reset difficulty and switch back to Monero's difficulty algorithm
-| 514,000                       | 2023-04-01 | Kunty Karen  | v0.11.0.0               | v0.11.0.1                   | View tags, fee changes, adjusted dynamic block weight algorithm, multisig security fixes, RPC broadcast node donation sub-address, Limit tx_extra max size to ~1kb, 12-hour difficulty adjustment window
+| 514,000                       | 2023-04-01 | Kunty Karen  | v0.11.0.0               | v0.11.0.2                   | View tags, fee changes, adjusted dynamic block weight algorithm, multisig security fixes, RPC broadcast node donation sub-address, Limit tx_extra max size to ~1kb, 12-hour difficulty adjustment window
 
 X's indicate that these details have not been determined as of commit date.
 
diff --git a/src/blocks/checkpoints.dat b/src/blocks/checkpoints.dat
index 32da1e63a..473149254 100644
Binary files a/src/blocks/checkpoints.dat and b/src/blocks/checkpoints.dat differ
diff --git a/src/checkpoints/checkpoints.cpp b/src/checkpoints/checkpoints.cpp
index 9a2a4af46..17f08e9c5 100644
--- a/src/checkpoints/checkpoints.cpp
+++ b/src/checkpoints/checkpoints.cpp
@@ -236,6 +236,8 @@ namespace cryptonote
     ADD_CHECKPOINT2(500000,  "f4f771261b8c13cd83a9d8fa22e3cfe988564ad4b57dd90e79d5c0e77d61cf6a", "0x1185e7f2357a03");
     ADD_CHECKPOINT2(503500,  "776f36a17056c3e22bbfb51d5aeabb58000731e9ad549f0f2f8ad1e1bcedf312", "0x11a4884467f53d");
     ADD_CHECKPOINT2(509900,  "59520faa272fc68e0426c827a38b21cdc1df8f5a37c5fdcbbe00350fece5f3ae", "0x11dc780bd1b580");
+    ADD_CHECKPOINT2(514000,  "1569e712750f19e57aee3f73cc3091a0eea392740bd396ad3570bc96e0e6ffb5", "0x11fff58abe0a82"); //Hard fork to v20
+    ADD_CHECKPOINT2(516700,  "0443c47c5a4e344c3f68a491a3b2f6b78a769cdf9076249c93f187ececf9cc7c", "0x12128a532a59a6");
     return true;
   }
 
diff --git a/src/checkpoints/checkpoints.dat b/src/checkpoints/checkpoints.dat
index 32da1e63a..473149254 100644
Binary files a/src/checkpoints/checkpoints.dat and b/src/checkpoints/checkpoints.dat differ
diff --git a/src/crypto/c_threads.h b/src/crypto/c_threads.h
index b4f773641..3457738b3 100644
--- a/src/crypto/c_threads.h
+++ b/src/crypto/c_threads.h
@@ -42,10 +42,11 @@
 #define CTHR_RWLOCK_TRYLOCK_READ(x)	TryAcquireSRWLockShared(&x)
 
 #define CTHR_THREAD_TYPE	HANDLE
-#define CTHR_THREAD_RTYPE	void
-#define CTHR_THREAD_RETURN	return
-#define CTHR_THREAD_CREATE(thr, func, arg)	((thr = (HANDLE)_beginthread(func, 0, arg)) != -1L)
-#define CTHR_THREAD_JOIN(thr)			WaitForSingleObject((HANDLE)thr, INFINITE)
+#define CTHR_THREAD_RTYPE	unsigned __stdcall
+#define CTHR_THREAD_RETURN	_endthreadex(0); return 0;
+#define CTHR_THREAD_CREATE(thr, func, arg)	((thr = (HANDLE)_beginthreadex(0, 0, func, arg, 0, 0)) != 0L)
+#define CTHR_THREAD_JOIN(thr)			do { WaitForSingleObject(thr, INFINITE); CloseHandle(thr); } while(0)
+#define CTHR_THREAD_CLOSE(thr)			CloseHandle((HANDLE)thr);
 
 #else
 
@@ -64,5 +65,6 @@
 #define CTHR_THREAD_RETURN	return NULL
 #define CTHR_THREAD_CREATE(thr, func, arg)	(pthread_create(&thr, NULL, func, arg) == 0)
 #define CTHR_THREAD_JOIN(thr)			pthread_join(thr, NULL)
+#define CTHR_THREAD_CLOSE(thr)
 
 #endif
diff --git a/src/crypto/rx-slow-hash.c b/src/crypto/rx-slow-hash.c
index 14fb56e07..672144fcf 100644
--- a/src/crypto/rx-slow-hash.c
+++ b/src/crypto/rx-slow-hash.c
@@ -332,7 +332,7 @@ static void rx_init_dataset(size_t max_threads) {
       local_abort("Couldn't start RandomX seed thread");
     }
   }
-  rx_seedthread(&si[n1]);
+  randomx_init_dataset(main_dataset, si[n1].si_cache, si[n1].si_start, si[n1].si_count);
   for (size_t i = 0; i < n1; ++i) CTHR_THREAD_JOIN(st[i]);
   CTHR_RWLOCK_UNLOCK_READ(main_cache_lock);
 
@@ -402,6 +402,7 @@ void rx_set_main_seedhash(const char *seedhash, size_t max_dataset_init_threads)
   if (!CTHR_THREAD_CREATE(t, rx_set_main_seedhash_thread, info)) {
     local_abort("Couldn't start RandomX seed thread");
   }
+  CTHR_THREAD_CLOSE(t);
 }
 
 void rx_slow_hash(const char *seedhash, const void *data, size_t length, char *result_hash) {
diff --git a/src/cryptonote_basic/verification_context.h b/src/cryptonote_basic/verification_context.h
index ffd07b27a..10a16a8c1 100644
--- a/src/cryptonote_basic/verification_context.h
+++ b/src/cryptonote_basic/verification_context.h
@@ -42,7 +42,12 @@ namespace cryptonote
     static_assert(unsigned(relay_method::none) == 0, "default m_relay initialization is not to relay_method::none");
 
     relay_method m_relay; // gives indication on how tx should be relayed (if at all)
-    bool m_verifivation_failed; //bad tx, should drop connection
+    bool m_verifivation_failed; //bad tx, tx should not enter mempool and connection should be dropped unless m_no_drop_offense
+    // Do not add to mempool, do not relay, but also do not punish the peer for sending or drop
+    // connections to them. Used for low fees, tx_extra too big, "relay-only rules". Not to be
+    // confused with breaking soft fork rules, because tx could be later added to the chain if mined
+    // because it does not violate consensus rules.
+    bool m_no_drop_offense;
     bool m_verifivation_impossible; //the transaction is related with an alternative blockchain
     bool m_added_to_pool; 
     bool m_low_mixin;
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index d40bb0f94..89b885520 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -5702,7 +5702,7 @@ void Blockchain::cancel()
 }
 
 #if defined(PER_BLOCK_CHECKPOINT)
-static const char expected_block_hashes_hash[] = "82164f48e44d04e7dc2fe7a42a08e64c40a68cb30c7cd6dcc68c88daa0406d5f";
+static const char expected_block_hashes_hash[] = "65b6c778f8e39068016cb1d01ae1236de24f73e74c5f4de5b259714b435374ea";
 void Blockchain::load_compiled_in_block_hashes(const GetCheckpointsCallback& get_checkpoints)
 {
   if (get_checkpoints == nullptr || !m_fast_sync)
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index 8d8ba198e..ba5005163 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -1103,7 +1103,7 @@ namespace cryptonote
       else if(tvc[i].m_verifivation_impossible)
       {MERROR_VER("Transaction verification impossible: " << results[i].hash);}
 
-      if(tvc[i].m_added_to_pool)
+      if(tvc[i].m_added_to_pool && results[i].tx.extra.size() <= MAX_TX_EXTRA_SIZE)
       {
         MDEBUG("tx added: " << results[i].hash);
         valid_events = true;
diff --git a/src/cryptonote_core/tx_pool.cpp b/src/cryptonote_core/tx_pool.cpp
index 8380d79b6..6624bdc14 100644
--- a/src/cryptonote_core/tx_pool.cpp
+++ b/src/cryptonote_core/tx_pool.cpp
@@ -207,6 +207,7 @@ namespace cryptonote
     {
       tvc.m_verifivation_failed = true;
       tvc.m_fee_too_low = true;
+      tvc.m_no_drop_offense = true;
       return false;
     }
 
@@ -225,6 +226,7 @@ namespace cryptonote
       LOG_PRINT_L1("transaction tx-extra is too big: " << tx_extra_size << " bytes, the limit is: " << MAX_TX_EXTRA_SIZE);
       tvc.m_verifivation_failed = true;
       tvc.m_tx_extra_too_big = true;
+      tvc.m_no_drop_offense = true;
       return false;
     }
 
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.inl b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
index 01748195f..a80f07003 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.inl
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
@@ -1020,7 +1020,7 @@ namespace cryptonote
     for (auto& tx : arg.txs)
     {
       tx_verification_context tvc{};
-      if (!m_core.handle_incoming_tx({tx, crypto::null_hash}, tvc, tx_relay, true))
+      if (!m_core.handle_incoming_tx({tx, crypto::null_hash}, tvc, tx_relay, true) && !tvc.m_no_drop_offense)
       {
         LOG_PRINT_CCONTEXT_L1("Tx verification failed, dropping connection");
         drop_connection(context, false, false);
diff --git a/src/version.cpp.in b/src/version.cpp.in
index 76ad81f38..0ea536ed7 100644
--- a/src/version.cpp.in
+++ b/src/version.cpp.in
@@ -1,5 +1,5 @@
 #define DEF_MONERO_VERSION_TAG "@VERSIONTAG@"
-#define DEF_MONERO_VERSION "0.11.0.1"
+#define DEF_MONERO_VERSION "0.11.0.2"
 #define DEF_MONERO_RELEASE_NAME "Kunty Karen"
 #define DEF_MONERO_VERSION_FULL DEF_MONERO_VERSION "-" DEF_MONERO_VERSION_TAG
 #define DEF_MONERO_VERSION_IS_RELEASE @VERSION_IS_RELEASE@