diff --git a/internal/cli/run_proxy.go b/internal/cli/run_proxy.go
index dd08265..4fbf7b9 100644
--- a/internal/cli/run_proxy.go
+++ b/internal/cli/run_proxy.go
@@ -156,7 +156,7 @@ func makeEventStream(conf *config.Config, logger mtglib.Logger) (mtglib.EventStr
 func runProxy(conf *config.Config, version string) error {
 	logger := makeLogger(conf)
 
-	logger.BindStr("configuration", conf.String()).Debug("configuration")
+	logger.BindJSON("configuration", conf.String()).Debug("configuration")
 
 	ntw, err := makeNetwork(conf, version)
 	if err != nil {
diff --git a/logger/noop.go b/logger/noop.go
index 61470ac..5d04b79 100644
--- a/logger/noop.go
+++ b/logger/noop.go
@@ -7,6 +7,7 @@ type noopLogger struct{}
 func (n noopLogger) Named(_ string) mtglib.Logger          { return n }
 func (n noopLogger) BindInt(_ string, _ int) mtglib.Logger { return n }
 func (n noopLogger) BindStr(_, _ string) mtglib.Logger     { return n }
+func (n noopLogger) BindJSON(_, _ string) mtglib.Logger    { return n }
 func (n noopLogger) Printf(_ string, _ ...interface{})     {}
 func (n noopLogger) Info(_ string)                         {}
 func (n noopLogger) Warning(_ string)                      {}
diff --git a/logger/zerolog.go b/logger/zerolog.go
index b0dc0b6..4f9c9b7 100644
--- a/logger/zerolog.go
+++ b/logger/zerolog.go
@@ -15,6 +15,7 @@ const (
 	zeroLogContextVarTypeUnknown zeroLogContextVarType = iota
 	zeroLogContextVarTypeStr
 	zeroLogContextVarTypeInt
+	zeroLogContextVarTypeJSON
 )
 
 type zeroLogContext struct {
@@ -66,6 +67,17 @@ func (z *zeroLogContext) BindStr(name, value string) mtglib.Logger {
 	}
 }
 
+func (z *zeroLogContext) BindJSON(name, value string) mtglib.Logger {
+	return &zeroLogContext{
+		name:       z.name,
+		log:        z.log,
+		ctxVarType: zeroLogContextVarTypeJSON,
+		ctxVarName: name,
+		ctxVarStr:  value,
+		parent:     z,
+	}
+}
+
 func (z *zeroLogContext) Printf(format string, args ...interface{}) {
 	z.Debug(fmt.Sprintf(format, args...))
 }
@@ -110,6 +122,8 @@ func (z *zeroLogContext) attachCtx(evt *zerolog.Event) {
 		evt.Str(z.ctxVarName, z.ctxVarStr)
 	case zeroLogContextVarTypeInt:
 		evt.Int(z.ctxVarName, z.ctxVarInt)
+	case zeroLogContextVarTypeJSON:
+		evt.RawJSON(z.ctxVarName, []byte(z.ctxVarStr))
 	case zeroLogContextVarTypeUnknown:
 	}
 }
diff --git a/mtglib/init.go b/mtglib/init.go
index 11a2fdf..08a4e2f 100644
--- a/mtglib/init.go
+++ b/mtglib/init.go
@@ -245,6 +245,9 @@ type Logger interface {
 	// BindStr binds new string parameter to a new logger instance.
 	BindStr(name, value string) Logger
 
+	// BindJSON binds a new JSON-encoded string to a new logger instance.
+	BindJSON(name, value string) Logger
+
 	// Printf is to support log.Logger behavior.
 	Printf(format string, args ...interface{})
 
diff --git a/mtglib/init_internal_test.go b/mtglib/init_internal_test.go
index 98127dd..b182d57 100644
--- a/mtglib/init_internal_test.go
+++ b/mtglib/init_internal_test.go
@@ -11,6 +11,7 @@ type NoopLogger struct{}
 func (n NoopLogger) Named(_ string) Logger             { return n }
 func (n NoopLogger) BindInt(_ string, _ int) Logger    { return n }
 func (n NoopLogger) BindStr(_, _ string) Logger        { return n }
+func (n NoopLogger) BindJSON(_, _ string) Logger       { return n }
 func (n NoopLogger) Printf(_ string, _ ...interface{}) {}
 func (n NoopLogger) Info(_ string)                     {}
 func (n NoopLogger) Warning(_ string)                  {}