diff --git a/src/hanoidb_nursery.erl b/src/hanoidb_nursery.erl
index 9d222ba..40b4f82 100644
--- a/src/hanoidb_nursery.erl
+++ b/src/hanoidb_nursery.erl
@@ -178,7 +178,7 @@ lookup(Key, #nursery{cache=Cache}) ->
 %% @end
 -spec finish(Nursery::#nursery{}, TopLevel::pid()) -> ok.
 finish(#nursery{ dir=Dir, cache=Cache, log_file=LogFile, merge_done=DoneMerge,
-                 count=Count, config=Config }=Nursery, TopLevel) ->
+                 count=Count, config=Config }, TopLevel) ->
 
     hanoidb_util:ensure_expiry(Config),
 
@@ -264,19 +264,36 @@ ensure_space(Nursery, NeededRoom, Top) ->
             flush(Nursery, Top)
     end.
 
-transact(Spec, Nursery=#nursery{ log_file=File, cache=Cache0, total_size=TotalSize }, Top) ->
+transact(Spec, Nursery=#nursery{ log_file=File, cache=Cache0, total_size=TotalSize, config=Config }, Top) ->
     Nursery1 = ensure_space(Nursery, length(Spec), Top),
 
-    TStamp = hanoidb_util:tstamp(),
-    Data = hanoidb_util:crc_encapsulate_transaction(Spec, TStamp),
+    Expiry =
+        case hanoidb:get_opt(expiry_secs, Config) of
+            0 ->
+                infinity;
+            DatabaseExpiryTime ->
+                hanoidb_util:expiry_time(DatabaseExpiryTime)
+        end,
+
+    Data = hanoidb_util:crc_encapsulate_transaction(Spec, Expiry),
     ok = file:write(File, Data),
 
     Nursery2 = do_sync(File, Nursery1),
 
     Cache2 = lists:foldl(fun({put, Key, Value}, Cache) ->
-                                 gb_trees:enter(Key, {Value, TStamp}, Cache);
+                                 case Expiry of
+                                     infinity ->
+                                         gb_trees:enter(Key, Value, Cache);
+                                     _ ->
+                                         gb_trees:enter(Key, {Value, Expiry}, Cache)
+                                 end;
                             ({delete, Key}, Cache) ->
-                                 gb_trees:enter(Key, {?TOMBSTONE, TStamp}, Cache)
+                                 case Expiry of
+                                     infinity ->
+                                         gb_trees:enter(Key, ?TOMBSTONE, Cache);
+                                     _ ->
+                                         gb_trees:enter(Key, {?TOMBSTONE, Expiry}, Cache)
+                                 end
                          end,
                          Cache0,
                          Spec),
@@ -344,7 +361,7 @@ is_expired({_Value, TStamp}) ->
 is_expired(Bin) when is_binary(Bin) ->
     false.
 
-get_value({Value, TStamp}) when is_integer(TStamp) ->
+get_value({Value, TStamp}) when is_integer(TStamp); TStamp =:= infinity ->
     Value;
 get_value(Value) when Value =:= ?TOMBSTONE; is_binary(Value) ->
     Value.
diff --git a/src/hanoidb_util.erl b/src/hanoidb_util.erl
index 9c08677..be6add6 100644
--- a/src/hanoidb_util.erl
+++ b/src/hanoidb_util.erl
@@ -146,6 +146,8 @@ decode_index_node(Level, Data) ->
     {ok, {node, Level, KVList}}.
 
 
+crc_encapsulate_kv_entry(Key, {Value, infinity}) ->
+    crc_encapsulate_kv_entry(Key, Value);
 crc_encapsulate_kv_entry(Key, {?TOMBSTONE, TStamp}) -> %
     crc_encapsulate( [?TAG_DELETED2, <<TStamp:32>> | Key] );
 crc_encapsulate_kv_entry(Key, ?TOMBSTONE) ->
@@ -158,12 +160,12 @@ crc_encapsulate_kv_entry(Key, {Pos,Len}) when Len < 16#ffffffff ->
     crc_encapsulate( [?TAG_POSLEN32, <<Pos:64/unsigned, Len:32/unsigned>>, Key] ).
 
 
-crc_encapsulate_transaction(TransactionSpec, TStamp) ->
+crc_encapsulate_transaction(TransactionSpec, Expiry) ->
     crc_encapsulate([?TAG_TRANSACT |
              lists:map(fun({delete, Key}) ->
-                                crc_encapsulate_kv_entry(Key, {?TOMBSTONE, TStamp});
+                                crc_encapsulate_kv_entry(Key, {?TOMBSTONE, Expiry});
                            ({put, Key, Value}) ->
-                                crc_encapsulate_kv_entry(Key, {Value, TStamp})
+                                crc_encapsulate_kv_entry(Key, {Value, Expiry})
                         end,
                         TransactionSpec)]).
 
@@ -239,7 +241,10 @@ expiry_time(ExpirySecs) when ExpirySecs > 0 ->
 
 -spec has_expired(pos_integer()) -> true|false.
 has_expired(Expiration) when Expiration > 0 ->
-    Expiration < tstamp().
+    Expiration < tstamp();
+has_expired(infinity) ->
+    false.
+
 
 ensure_expiry(Opts) ->
     case hanoidb:get_opt(expiry_secs, Opts) of