diff --git a/embulk-input-jdbc/src/main/java/org/embulk/input/jdbc/Ssl.java b/embulk-input-jdbc/src/main/java/org/embulk/input/jdbc/Ssl.java
new file mode 100644
index 00000000..a1b5501e
--- /dev/null
+++ b/embulk-input-jdbc/src/main/java/org/embulk/input/jdbc/Ssl.java
@@ -0,0 +1,37 @@
+package org.embulk.input.jdbc;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+import org.embulk.config.ConfigException;
+
+public enum Ssl
+{
+    ENABLE,
+    DISABLE,
+    VERIFY;
+
+    @JsonValue
+    @Override
+    public String toString()
+    {
+        return this.name().toLowerCase();
+    }
+
+    @JsonCreator
+    public static Ssl fromString(String value)
+    {
+        switch(value) {
+        case "enable":
+        case "true":
+            return ENABLE;
+        case "disable":
+        case "false":
+            return DISABLE;
+        case "verify":
+            return VERIFY;
+        default:
+            throw new ConfigException(String.format("Unknown SSL value '%s'. Supported values are enable, true, disable, false or verify.", value));
+        }
+    }
+}