bug fix

pom.xml

@@ -709,7 +709,17 @@
 		<dependency>
 			<groupId>com.itextpdf</groupId>
 			<artifactId>itextpdf</artifactId>
-			<version>5.5.13</version>
+			<version>5.3.2</version>
+		</dependency>
+		<dependency>
+			<groupId>org.bouncycastle</groupId>
+			<artifactId>bcprov-jdk15on</artifactId>
+			<version>1.47</version>
+		</dependency>
+		<dependency>
+			<groupId>org.bouncycastle</groupId>
+			<artifactId>bcmail-jdk15on</artifactId>
+			<version>1.47</version>
 		</dependency>
 		<!--twelvemonkeys图片处理-->
 		<dependency>