diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2b9a1e4..02077b5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.0)
 project(libnbt++
-    VERSION 2.4.1)
+    VERSION 2.5)
 
 # supported configure options
 option(NBT_BUILD_SHARED "Build shared libraries" OFF)
diff --git a/src/text/json_formatter.cpp b/src/text/json_formatter.cpp
index beb6c46..4bcb12d 100644
--- a/src/text/json_formatter.cpp
+++ b/src/text/json_formatter.cpp
@@ -156,7 +156,7 @@ namespace //anonymous
             os << "[";
             for(unsigned int i = 0; i < la.size(); ++i)
             {
-                os << la[i];
+                os << la[i] << "l";
                 if(i != la.size()-1)
                     os << ", ";
             }
diff --git a/test/read_test.h b/test/read_test.h
index 4f71495..60516c9 100644
--- a/test/read_test.h
+++ b/test/read_test.h
@@ -37,7 +37,7 @@ class read_test : public CxxTest::TestSuite
         std::string input{
             1, //tag_type::Byte
             0, //tag_type::End
-            11, //tag_type::Int_Array
+            12, //tag_type::Long_Array
 
             0x0a, 0x0b, 0x0c, 0x0d, //0x0a0b0c0d in Big Endian
 
@@ -54,7 +54,7 @@ class read_test : public CxxTest::TestSuite
 
         TS_ASSERT_EQUALS(reader.read_type(), tag_type::Byte);
         TS_ASSERT_EQUALS(reader.read_type(true), tag_type::End);
-        TS_ASSERT_EQUALS(reader.read_type(false), tag_type::Int_Array);
+        TS_ASSERT_EQUALS(reader.read_type(false), tag_type::Long_Array);
 
         int32_t i;
         reader.read_num(i);
@@ -107,7 +107,7 @@ class read_test : public CxxTest::TestSuite
     //Tests if comp equals an extended variant of Notch's bigtest NBT
     void verify_bigtest_structure(const tag_compound& comp)
     {
-        TS_ASSERT_EQUALS(comp.size(), 13u);
+        TS_ASSERT_EQUALS(comp.size(), 14u);
 
         TS_ASSERT(comp.at("byteTest") == tag_byte(127));
         TS_ASSERT(comp.at("shortTest") == tag_short(32767));
@@ -138,6 +138,9 @@ class read_test : public CxxTest::TestSuite
 
         TS_ASSERT(comp.at("intArrayTest") == tag_int_array(
             {0x00010203, 0x04050607, 0x08090a0b, 0x0c0d0e0f}));
+
+        TS_ASSERT(comp.at("longArrayTest") == tag_long_array(
+            {0x0decafc0ffeebabe, static_cast<int64_t>(0xdeadbeefbaadf00d)}));
     }
 
     void test_read_bigtest()
@@ -216,6 +219,7 @@ class read_test : public CxxTest::TestSuite
             "Even though unprovided for by NBT, the library should also handle "
             "the case where the file consists of something else than tag_compound"));
     }
+
     void test_read_gzip()
     {
 #ifdef NBT_HAVE_ZLIB
diff --git a/test/testfiles/bigtest.nbt b/test/testfiles/bigtest.nbt
index de1a912..7647bcc 100644
Binary files a/test/testfiles/bigtest.nbt and b/test/testfiles/bigtest.nbt differ
diff --git a/test/testfiles/bigtest.zlib b/test/testfiles/bigtest.zlib
index 36aeee5..87aea9a 100644
Binary files a/test/testfiles/bigtest.zlib and b/test/testfiles/bigtest.zlib differ
diff --git a/test/testfiles/bigtest_uncompr b/test/testfiles/bigtest_uncompr
index dc1c9c1..1e378b4 100644
Binary files a/test/testfiles/bigtest_uncompr and b/test/testfiles/bigtest_uncompr differ
diff --git a/test/testfiles/littletest_uncompr b/test/testfiles/littletest_uncompr
index 86619e9..2f1bd61 100644
Binary files a/test/testfiles/littletest_uncompr and b/test/testfiles/littletest_uncompr differ
diff --git a/test/write_test.h b/test/write_test.h
index a302891..b9be132 100644
--- a/test/write_test.h
+++ b/test/write_test.h
@@ -44,7 +44,7 @@ class read_test : public CxxTest::TestSuite
 
         writer.write_type(tag_type::End);
         writer.write_type(tag_type::Long);
-        writer.write_type(tag_type::Int_Array);
+        writer.write_type(tag_type::Long_Array);
 
         writer.write_num(int64_t(0x0102030405060708));
 
@@ -54,7 +54,7 @@ class read_test : public CxxTest::TestSuite
         std::string expected{
             0, //tag_type::End
             4, //tag_type::Long
-            11, //tag_type::Int_Array
+            12, //tag_type::Long_Array
 
             0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, //0x0102030405060708 in Big Endian
 
@@ -147,6 +147,15 @@ class read_test : public CxxTest::TestSuite
         }));
         os.str("");
 
+        //tag_long_array
+        writer.write_payload(tag_long_array{0x0102030405060708, 0x090a0b0c0d0e0f10});
+        TS_ASSERT_EQUALS(os.str(), (std::string{
+            0x00, 0x00, 0x00, 0x02, //length in Big Endian
+            0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+            0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10
+        }));
+        os.str("");
+
         //tag_list
         writer.write_payload(tag_list()); //empty list with undetermined type, should be written as list of tag_end
         writer.write_payload(tag_list(tag_type::Int)); //empty list of tag_int