diff --git a/.golangci.yaml b/.golangci.yaml
index 791f574f..a983c508 100644
--- a/.golangci.yaml
+++ b/.golangci.yaml
@@ -19,6 +19,10 @@ linters:
     - perfsprint
     - gocritic
 linters-settings:
+  errcheck:
+    check-type-assertions: true
+    check-blank: true
+    disable-default-exclusions: true
   govet:
     enable-all: true
     disable:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 272a1e82..bc806dbc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [#480](https://github.com/XenitAB/spegel/pull/480) Enable ireturn linter and fix errors.
 - [#481](https://github.com/XenitAB/spegel/pull/481) Enable perfsprint linter and fix errors.
 - [#482](https://github.com/XenitAB/spegel/pull/482) Enable gocritic linter and fix errors.
+- [#483](https://github.com/XenitAB/spegel/pull/483) Update errcheck linter configuration and fix errors.
 
 ### Deprecated
 
diff --git a/internal/mux/response.go b/internal/mux/response.go
index 50593c95..6b1ce906 100644
--- a/internal/mux/response.go
+++ b/internal/mux/response.go
@@ -52,11 +52,13 @@ func (r *response) WriteError(statusCode int, err error) {
 
 func (r *response) Flush() {
 	r.writtenHeader = true
+	//nolint: errcheck // No method to throw the error.
 	flusher := r.ResponseWriter.(http.Flusher)
 	flusher.Flush()
 }
 
 func (r *response) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	//nolint: errcheck // No method to throw the error.
 	hijacker := r.ResponseWriter.(http.Hijacker)
 	return hijacker.Hijack()
 }