diff --git a/.github/workflows/elixir.yml b/.github/workflows/elixir.yml
index 944a89a6..559e6c99 100644
--- a/.github/workflows/elixir.yml
+++ b/.github/workflows/elixir.yml
@@ -23,8 +23,8 @@ jobs:
           - elixir: "1.18.4"
             otp: "28.0"
           # Latest 1.19 series with OTP 28
-          - elixir: "1.19.0"
-            otp: "28.1"
+          - elixir: "1.19.2"
+            otp: "28.1.1"
     steps:
       - uses: actions/checkout@v3
 
@@ -75,9 +75,9 @@ jobs:
           mix test --trace
 
       - name: Check formatting
-        if: matrix.elixir == '1.19.0' && matrix.otp == '28.1'
+        if: matrix.elixir == '1.19.2' && matrix.otp == '28.1.1'
         run: mix format --check-formatted
 
       - name: Run Dialyzer
-        if: matrix.elixir == '1.19.0' && matrix.otp == '28.1'
+        if: matrix.elixir == '1.19.2' && matrix.otp == '28.1.1'
         run: mix dialyzer
diff --git a/.tool-versions b/.tool-versions
index 25c82f64..1c04b9d3 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,3 +1,3 @@
-erlang 28.1
-elixir 1.19.0-otp-28
+erlang 28.1.1
+elixir 1.19.2-otp-28
 nodejs 24.4.1
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89e86fae..cb7c0980 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,11 +6,17 @@
 
 - Fix custom opts in API requests - change `:query` to `:params` to match Req API requirements
 
+### Dependencies
+
+- Update Erlang to 28.1.1 and Elixir to 1.19.2
+- Relax dependency version constraints to allow latest patch versions automatically
+- Add Elixir 1.19 support to mix.exs version constraint
+
 ### CI/Testing
 
-- Add Elixir 1.19.0 and OTP 28.1 to test matrix
-- Update .tool-versions to Elixir 1.19.0 and OTP 28.1
-- Update CI formatting and dialyzer checks to run on Elixir 1.19.0
+- Update CI test matrix to include Elixir 1.19.2 with OTP 28.1.1
+- Update .tool-versions to Erlang 28.1.1 and Elixir 1.19.2
+- Update CI format check and dialyzer conditions for new versions
 
 ## v3.1.1 (2025-09-04)
 
diff --git a/mix.exs b/mix.exs
index 585d5ced..0eb0a1e6 100644
--- a/mix.exs
+++ b/mix.exs
@@ -13,7 +13,7 @@ defmodule DocuSign.MixProject do
       name: "DocuSign",
       app: :docusign,
       version: @version,
-      elixir: "~> 1.16 or ~> 1.17 or ~> 1.18",
+      elixir: "~> 1.16 or ~> 1.17 or ~> 1.18 or ~> 1.19",
       package: package(),
       source_url: @url,
       maintainers: @maintainers,
@@ -44,13 +44,13 @@ defmodule DocuSign.MixProject do
   defp deps do
     [
       {:req, "~> 0.5"},
-      {:jason, "~> 1.4.4"},
+      {:jason, "~> 1.4"},
       {:joken, "~> 2.0"},
       {:oauth2, "~> 2.0"},
-      {:castore, "~> 1.0.15"},
+      {:castore, "~> 1.0"},
       {:finch, "~> 0.20"},
-      {:temp, "~> 0.4.9"},
-      {:plug, "~> 1.18.1"},
+      {:temp, "~> 0.4"},
+      {:plug, "~> 1.18"},
       {:cowlib, "2.15.0"},
 
       # test
@@ -59,11 +59,11 @@ defmodule DocuSign.MixProject do
       {:briefly, "~> 0.5", only: :test},
 
       # dev
-      {:ex_doc, "~> 0.38.3", only: :dev},
+      {:ex_doc, "~> 0.38", only: :dev},
       {:credo, "~> 1.0", only: [:dev, :test], runtime: false},
-      {:dialyxir, "~> 1.4.6", only: [:dev], runtime: false},
+      {:dialyxir, "~> 1.4", only: [:dev], runtime: false},
       {:mix_test_watch, "~> 1.0", only: :dev, runtime: false},
-      {:quokka, "~> 2.11.2", only: [:dev, :test], runtime: false}
+      {:quokka, "~> 2.11", only: [:dev, :test], runtime: false}
     ]
   end