diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index 3cf5264d..779876a1 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -15,7 +15,7 @@ add_subdirectory(miniupnp/miniupnpc)
 
 set_property(TARGET libminiupnpc-static PROPERTY FOLDER "contrib")
 set_property(TARGET zlibstatic PROPERTY FOLDER "contrib")
-set_property(TARGET mdbx-static PROPERTY FOLDER "contrib")
+set_property(TARGET mdbx PROPERTY FOLDER "contrib")
 set_property(TARGET lmdb PROPERTY FOLDER "contrib")
 set_property(TARGET upnpc-static mdbx_chk mdbx_copy mdbx_dump mdbx_load mdbx_stat PROPERTY FOLDER "unused")
 
diff --git a/contrib/db/libmdbx b/contrib/db/libmdbx
index 0e2ca3eb..b7ed6754 160000
--- a/contrib/db/libmdbx
+++ b/contrib/db/libmdbx
@@ -1 +1 @@
-Subproject commit 0e2ca3eb515d6939513a29321aaf13678f682e8b
+Subproject commit b7ed67543fefb0878dba1c70dea2a81201041314
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5e71c397..807d2a16 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -155,7 +155,7 @@ add_dependencies(stratum version ${PCH_LIB_NAME})
 ENABLE_SHARED_PCH(stratum STRATUM)
 
 
-target_link_libraries(currency_core lmdb mdbx-static)
+target_link_libraries(currency_core lmdb mdbx)
 
 add_executable(daemon ${DAEMON} ${P2P} ${CURRENCY_PROTOCOL})
 add_dependencies(daemon version)
diff --git a/src/common/db_backend_mdbx.cpp b/src/common/db_backend_mdbx.cpp
index 1a048c9c..3307dec8 100644
--- a/src/common/db_backend_mdbx.cpp
+++ b/src/common/db_backend_mdbx.cpp
@@ -143,10 +143,10 @@ namespace tools
         else
         {
           int res = 0;
-          MDBX_txn_flags_t flags = MDBX_txn_flags_t();
-          unsigned int flags_ = 0;
+          //MDBX_txn_flags_t flags = MDBX_txn_flags_t();
+          unsigned int flags = 0;
           if (read_only)
-            flags = MDBX_TXN_RDONLY;
+            flags = MDBX_RDONLY;//flags = MDBX_TXN_RDONLY;
 
           //don't use parent tx in write transactions if parent tx was read-only (restriction in mdbx) 
           //see "Nested transactions: Max 1 child, write txns only, no writemap"
@@ -341,7 +341,8 @@ namespace tools
       data[0].iov_base = (void*)v;
       data[0].iov_len = vs;
 
-      MDBX_put_flags_t flags = MDBX_put_flags_t();
+      //MDBX_put_flags_t flags = MDBX_put_flags_t();
+      unsigned  flags = 0;
       res = mdbx_put(get_current_tx(), static_cast<MDBX_dbi>(h), &key, data, flags);
       CHECK_AND_ASSERT_MESS_MDBX_DB(res, false, "Unable to mdbx_put");
       return true;