diff --git a/rebar.config b/rebar.config
index 0ed42c77..896533b3 100644
--- a/rebar.config
+++ b/rebar.config
@@ -3,7 +3,7 @@
 
 {deps, [{erlware_commons,     "1.3.1"},
         {ssl_verify_fun,      "1.1.6"},
-        {certifi,             "2.5.2"},
+        {certifi,             "2.5.3"},
         {parse_trans,         "3.3.0"}, % force otp-21 compat
         {providers,           "1.8.1"},
         {getopt,              "1.0.1"},
diff --git a/rebar.lock b/rebar.lock
index 8355e9e5..05f59e82 100644
--- a/rebar.lock
+++ b/rebar.lock
@@ -1,6 +1,6 @@
 {"1.2.0",
 [{<<"bbmustache">>,{pkg,<<"bbmustache">>,<<"1.10.0">>},0},
- {<<"certifi">>,{pkg,<<"certifi">>,<<"2.5.2">>},0},
+ {<<"certifi">>,{pkg,<<"certifi">>,<<"2.5.3">>},0},
  {<<"cf">>,{pkg,<<"cf">>,<<"0.3.1">>},0},
  {<<"cth_readable">>,{pkg,<<"cth_readable">>,<<"1.4.9">>},0},
  {<<"erlware_commons">>,{pkg,<<"erlware_commons">>,<<"1.3.1">>},0},
@@ -13,7 +13,7 @@
 [
 {pkg_hash,[
  {<<"bbmustache">>, <<"DDC927463F0E95D66CDAC889153AF08015D609124D6D79006C248AD2DE7F6ECD">>},
- {<<"certifi">>, <<"B7CFEAE9D2ED395695DD8201C57A2D019C0C43ECAF8B8BCB9320B40D6662F340">>},
+ {<<"certifi">>, <<"70BDD7E7188C804F3A30EE0E7C99655BC35D8AC41C23E12325F36AB449B70651">>},
  {<<"cf">>, <<"5CB902239476E141EA70A740340233782D363A31EEA8AD37049561542E6CD641">>},
  {<<"cth_readable">>, <<"034FB69795F11061980ECB62B40EF51DC10D4AC115B98FDB2C0CC71D851FBF98">>},
  {<<"erlware_commons">>, <<"0CE192AD69BC6FD0880246D852D0ECE17631E234878011D1586E053641ED4C04">>},
@@ -25,7 +25,7 @@
  {<<"ssl_verify_fun">>, <<"CF344F5692C82D2CD7554F5EC8FD961548D4FD09E7D22F5B62482E5AEAEBD4B0">>}]},
 {pkg_hash_ext,[
  {<<"bbmustache">>, <<"43EFFA3FD4BB9523157AF5A9E2276C493495B8459FC8737144AA186CB13CE2EE">>},
- {<<"certifi">>, <<"3B3B5F36493004AC3455966991EAF6E768CE9884693D9968055AEEEB1E575040">>},
+ {<<"certifi">>, <<"ED516ACB3929B101208A9D700062D520F3953DA3B6B918D866106FFA980E1C10">>},
  {<<"cf">>, <<"315E8D447D3A4B02BCDBFA397AD03BBB988A6E0AA6F44D3ADD0F4E3C3BF97672">>},
  {<<"cth_readable">>, <<"B4C6ABABDB046C5F2FBB3C22F030B4C5A679083956DCDD29C1DF0CB30B18DA24">>},
  {<<"erlware_commons">>, <<"7AADA93F368D0A0430122E39931B7FB4AC9E94DBF043CDC980AD4330FD9CD166">>},