diff --git a/pkg/api/http_client.go b/pkg/api/http_client.go
index 2195306..d9529f1 100644
--- a/pkg/api/http_client.go
+++ b/pkg/api/http_client.go
@@ -122,6 +122,7 @@ func NewHTTPClient(opts ClientOptions) (*http.Client, error) {
 func inspectableMIMEType(t string) bool {
 	return strings.HasPrefix(t, "text/") ||
 		strings.HasPrefix(t, "application/x-www-form-urlencoded") ||
+		strings.HasPrefix(t, "application/octocat-stream") ||
 		jsonTypeRE.MatchString(t)
 }
 
diff --git a/pkg/api/http_client_test.go b/pkg/api/http_client_test.go
index 19c911d..a849d05 100644
--- a/pkg/api/http_client_test.go
+++ b/pkg/api/http_client_test.go
@@ -184,3 +184,59 @@ func printPendingMocks(mocks []gock.Mock) string {
 	}
 	return fmt.Sprintf("%d unmatched mocks: %s", len(paths), strings.Join(paths, ", "))
 }
+
+func TestInspectableMIMEType(t *testing.T) {
+	tests := []struct {
+		name     string
+		mimeType string
+		want     bool
+	}{
+		{
+			name:     "text/plain is inspectable",
+			mimeType: "text/plain",
+			want:     true,
+		},
+		{
+			name:     "text/html is inspectable",
+			mimeType: "text/html",
+			want:     true,
+		},
+		{
+			name:     "application/json is inspectable",
+			mimeType: "application/json",
+			want:     true,
+		},
+		{
+			name:     "application/json with charset is inspectable",
+			mimeType: "application/json; charset=utf-8",
+			want:     true,
+		},
+		{
+			name:     "application/x-www-form-urlencoded is inspectable",
+			mimeType: "application/x-www-form-urlencoded",
+			want:     true,
+		},
+		{
+			name:     "application/octocat-stream is inspectable",
+			mimeType: "application/octocat-stream",
+			want:     true,
+		},
+		{
+			name:     "application/octet-stream is not inspectable",
+			mimeType: "application/octet-stream",
+			want:     false,
+		},
+		{
+			name:     "image/png is not inspectable",
+			mimeType: "image/png",
+			want:     false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := inspectableMIMEType(tt.mimeType)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}