diff --git a/rebar.config b/rebar.config
index e1ae94bd2..9ef8bc0fc 100644
--- a/rebar.config
+++ b/rebar.config
@@ -11,7 +11,7 @@
         {p1_utils, ".*", {git, "https://github.com/processone/p1_utils", {tag, "1.0.5"}}},
         {cache_tab, ".*", {git, "https://github.com/processone/cache_tab", {tag, "1.0.3"}}},
         {fast_tls, ".*", {git, "https://github.com/processone/fast_tls", {tag, "1.0.6"}}},
-        {stringprep, ".*", {git, "https://github.com/processone/stringprep", {tag, "1.0.4"}}},
+        {stringprep, ".*", {git, "https://github.com/processone/stringprep", {tag, "1.0.5"}}},
         {fast_xml, ".*", {git, "https://github.com/processone/fast_xml", {tag, "1.1.14"}}},
         {stun, ".*", {git, "https://github.com/processone/stun", {tag, "1.0.6"}}},
         {esip, ".*", {git, "https://github.com/processone/esip", {tag, "1.0.7"}}},
@@ -44,7 +44,7 @@
         {if_var_true, elixir, {rebar_elixir_plugin, ".*",
                                {git, "https://github.com/processone/rebar_elixir_plugin", "0.1.0"}}},
         {if_var_true, iconv, {iconv, ".*", {git, "https://github.com/processone/iconv",
-                                            {tag, "1.0.0"}}}},
+                                            {tag, "1.0.1"}}}},
         {if_var_true, tools, {meck, "0.8.*", {git, "https://github.com/eproxus/meck",
                                               {tag, "0.8.4"}}}},
         {if_var_true, tools, {moka, ".*", {git, "https://github.com/processone/moka.git",