diff --git a/CHANGELOG.md b/CHANGELOG.md
index dadefa6..c3a251a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 # Version 1.8.3
 
+* Updating fast_tls to version 1.1.21.
 * Improve handling of muc retracions
 * Add support for muc#roominfo_avatarhash field
 
diff --git a/rebar.config b/rebar.config
index 2e02ae1..15b8738 100644
--- a/rebar.config
+++ b/rebar.config
@@ -35,7 +35,7 @@
 
 {deps, [{p1_utils, "~> 1.0.25", {git, "https://github.com/processone/p1_utils", {tag, "1.0.26"}}},
 	{fast_xml, "~> 1.1.51", {git, "https://github.com/processone/fast_xml", {tag, "1.1.52"}}},
-	{fast_tls, "~> 1.1.19", {git, "https://github.com/processone/fast_tls", {tag, "1.1.20"}}},
+	{fast_tls, "~> 1.1.19", {git, "https://github.com/processone/fast_tls", {tag, "1.1.21"}}},
 	{ezlib, "~> 1.0.12", {git, "https://github.com/processone/ezlib", {tag, "1.0.13"}}},
 	{idna, "~> 6.0", {git, "https://github.com/benoitc/erlang-idna", {tag, "6.0.0"}}},
         {stringprep, "~> 1.0.29", {git, "https://github.com/processone/stringprep", {tag, "1.0.30"}}}]}.
diff --git a/src/xmpp.app.src b/src/xmpp.app.src
index a0d1dd9..42a1d79 100644
--- a/src/xmpp.app.src
+++ b/src/xmpp.app.src
@@ -24,7 +24,7 @@
 
 {application, xmpp,
  [{description,  "Erlang/Elixir XMPP parsing and serialization library"},
-  {vsn,          "1.8.2"},
+  {vsn,          "1.8.3"},
   {modules,      []},
   {registered,   []},
   {applications, [asn1, compiler, kernel, public_key, stdlib, syntax_tools,