diff --git a/contrib/ethereum/libethash/ethash/ethash.hpp b/contrib/ethereum/libethash/ethash/ethash.hpp
index 03f29afd..8034090b 100644
--- a/contrib/ethereum/libethash/ethash/ethash.hpp
+++ b/contrib/ethereum/libethash/ethash/ethash.hpp
@@ -156,5 +156,5 @@ int find_epoch_number(const hash256& seed) noexcept;
 const epoch_context& get_global_epoch_context(int epoch_number);
 
 /// Get global shared epoch context with full dataset initialized.
-const epoch_context_full& get_global_epoch_context_full(int epoch_number);
+std::shared_ptr<epoch_context_full> get_global_epoch_context_full(int epoch_number);
 }  // namespace ethash
diff --git a/contrib/ethereum/libethash/managed.cpp b/contrib/ethereum/libethash/managed.cpp
index 900da7e7..82ff69b2 100644
--- a/contrib/ethereum/libethash/managed.cpp
+++ b/contrib/ethereum/libethash/managed.cpp
@@ -89,12 +89,12 @@ const epoch_context& get_global_epoch_context(int epoch_number)
     return *thread_local_context;
 }
 
-const epoch_context_full& get_global_epoch_context_full(int epoch_number)
+std::shared_ptr<epoch_context_full> get_global_epoch_context_full(int epoch_number)
 {
     // Check if local context matches epoch number.
     if (!thread_local_context_full || thread_local_context_full->epoch_number != epoch_number)
         update_local_context_full(epoch_number);
 
-    return *thread_local_context_full;
+    return thread_local_context_full;
 }
 }  // namespace ethash
diff --git a/src/currency_core/basic_pow_helpers.cpp b/src/currency_core/basic_pow_helpers.cpp
index 7c2275cc..b97a1087 100644
--- a/src/currency_core/basic_pow_helpers.cpp
+++ b/src/currency_core/basic_pow_helpers.cpp
@@ -50,8 +50,9 @@ namespace currency
   crypto::hash get_block_longhash(uint64_t height, const crypto::hash& block_header_hash, uint64_t nonce)
   {
     int epoch = ethash_height_to_epoch(height);
-    const auto& context = progpow::get_global_epoch_context_full(static_cast<int>(epoch));
-    auto res_eth = progpow::hash(context,  static_cast<int>(height), *(ethash::hash256*)&block_header_hash, nonce);
+    std::shared_ptr<ethash::epoch_context_full> p_context = progpow::get_global_epoch_context_full(static_cast<int>(epoch));
+    CHECK_AND_ASSERT_THROW_MES(p_context, "progpow::get_global_epoch_context_full returned null");
+    auto res_eth = progpow::hash(*p_context,  static_cast<int>(height), *(ethash::hash256*)&block_header_hash, nonce);
     crypto::hash result = currency::null_hash;
     memcpy(&result.data, &res_eth.final_hash, sizeof(res_eth.final_hash));
     return result;
diff --git a/src/version.h.in b/src/version.h.in
index 351ac76a..307ec14d 100644
--- a/src/version.h.in
+++ b/src/version.h.in
@@ -2,6 +2,6 @@
 
 #define BUILD_COMMIT_ID "@VERSION@"
 #define PROJECT_VERSION "1.0"
-#define PROJECT_VERSION_BUILD_NO 48
+#define PROJECT_VERSION_BUILD_NO 49
 #define PROJECT_VERSION_BUILD_NO_STR STRINGIFY_EXPAND(PROJECT_VERSION_BUILD_NO)
 #define PROJECT_VERSION_LONG PROJECT_VERSION "." PROJECT_VERSION_BUILD_NO_STR "[" BUILD_COMMIT_ID "]"