diff --git a/quickfixj-core/pom.xml b/quickfixj-core/pom.xml
index 2b40e79ebf..f2acb51fc0 100644
--- a/quickfixj-core/pom.xml
+++ b/quickfixj-core/pom.xml
@@ -34,7 +34,7 @@
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-all</artifactId>
-            <version>1.1</version>
+            <version>1.3</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/quickfixj-core/src/main/java/quickfix/field/converter/UtcTimestampConverter.java b/quickfixj-core/src/main/java/quickfix/field/converter/UtcTimestampConverter.java
index 21c10571bf..88d1a2b5c6 100644
--- a/quickfixj-core/src/main/java/quickfix/field/converter/UtcTimestampConverter.java
+++ b/quickfixj-core/src/main/java/quickfix/field/converter/UtcTimestampConverter.java
@@ -24,10 +24,10 @@
 import quickfix.SystemTime;
 
 import java.text.DateFormat;
+import java.time.DateTimeException;
 import java.time.LocalDateTime;
 import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatter;
-import java.time.format.DateTimeParseException;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;
@@ -135,26 +135,37 @@ public static Date convert(String value) throws FieldConvertError {
      */
     public static LocalDateTime convertToLocalDateTime(String value) throws FieldConvertError {
         verifyFormat(value);
-        int length = value.length();
         try {
-            switch (length) {
-                case LENGTH_INCL_SECONDS:
-                    return LocalDateTime.parse(value, FORMATTER_SECONDS);
-                case LENGTH_INCL_MILLIS:
-                    return LocalDateTime.parse(value, FORMATTER_MILLIS);
-                case LENGTH_INCL_MICROS:
-                    return LocalDateTime.parse(value, FORMATTER_MICROS);
-                case LENGTH_INCL_NANOS:
-                case LENGTH_INCL_PICOS:
-                    return LocalDateTime.parse(value.substring(0, LENGTH_INCL_NANOS), FORMATTER_NANOS);
-                default:
-                    throwFieldConvertError(value, TYPE);
+            int length = value.length();
+            int ns = 0;
+            if (length >= LENGTH_INCL_NANOS) {
+                ns = parseInt(value, 18, 9);
+            } else if (length == LENGTH_INCL_MICROS) {
+                ns = parseInt(value, 18, 6) * 1000;
+            } else if (length == LENGTH_INCL_MILLIS) {
+                ns = parseInt(value, 18, 3) * 1000000;
             }
-        } catch (DateTimeParseException e) {
+    
+            int yy = parseInt(value, 0, 4);
+            int mm = parseInt(value, 4, 2);
+            int dd = parseInt(value, 6, 2);
+            int h = parseInt(value, 9, 2);
+            int m = parseInt(value, 12, 2);
+            int s = parseInt(value, 15, 2);
+            return LocalDateTime.of(yy, mm, dd, h, m, s, ns);
+        } catch (DateTimeException e) {
             throwFieldConvertError(value, TYPE);
         }
         return null;
-    } 
+    }
+    
+    private static int parseInt(String value, int off, int len) {
+        int num = 0;
+        for (int index = 0; index < len; index++) {
+            num = (num * 10) + value.charAt(off + index) - '0';
+        }
+        return num;
+    }
 
     private static Long getMillisForDay(String value) {
         // Performance optimization: the calendar for the start of the day is cached.