diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 7ac8eadf..5f383af5 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.166.0"
+  ".": "1.166.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8397eeba..74ac06db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.166.1 (2025-12-18)
+
+Full Changelog: [v1.166.0...v1.166.1](https://github.com/Increase/increase-ruby/compare/v1.166.0...v1.166.1)
+
+### Bug Fixes
+
+* issue where json.parse errors when receiving HTTP 204 with nobody ([35cc667](https://github.com/Increase/increase-ruby/commit/35cc6675facca611a5d519a87fa7affc8a0bbb8e))
+
 ## 1.166.0 (2025-12-17)
 
 Full Changelog: [v1.165.0...v1.166.0](https://github.com/Increase/increase-ruby/compare/v1.165.0...v1.166.0)
diff --git a/Gemfile.lock b/Gemfile.lock
index 53c62521..f5806979 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    increase (1.166.0)
+    increase (1.166.1)
       connection_pool
 
 GEM
diff --git a/README.md b/README.md
index b44fd205..f20555d0 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ To use this gem, install via Bundler by adding the following to your application
 <!-- x-release-please-start-version -->
 
 ```ruby
-gem "increase", "~> 1.166.0"
+gem "increase", "~> 1.166.1"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/increase/internal/util.rb b/lib/increase/internal/util.rb
index d0632658..d567467b 100644
--- a/lib/increase/internal/util.rb
+++ b/lib/increase/internal/util.rb
@@ -657,7 +657,8 @@ def force_charset!(content_type, text:)
         def decode_content(headers, stream:, suppress_error: false)
           case (content_type = headers["content-type"])
           in Increase::Internal::Util::JSON_CONTENT
-            json = stream.to_a.join
+            return nil if (json = stream.to_a.join).empty?
+
             begin
               JSON.parse(json, symbolize_names: true)
             rescue JSON::ParserError => e
@@ -667,7 +668,11 @@ def decode_content(headers, stream:, suppress_error: false)
           in Increase::Internal::Util::JSONL_CONTENT
             lines = decode_lines(stream)
             chain_fused(lines) do |y|
-              lines.each { y << JSON.parse(_1, symbolize_names: true) }
+              lines.each do
+                next if _1.empty?
+
+                y << JSON.parse(_1, symbolize_names: true)
+              end
             end
           in %r{^text/event-stream}
             lines = decode_lines(stream)
diff --git a/lib/increase/version.rb b/lib/increase/version.rb
index 2991ad62..e498f0e4 100644
--- a/lib/increase/version.rb
+++ b/lib/increase/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Increase
-  VERSION = "1.166.0"
+  VERSION = "1.166.1"
 end