diff --git a/REQUIRE b/REQUIRE
index 5c0d3d8..e0ee8c3 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,2 +1,2 @@
 julia 0.6
-Compat 0.30.0
+Compat 0.33.0
diff --git a/src/Parser.jl b/src/Parser.jl
index 3f93c65..b4477fd 100644
--- a/src/Parser.jl
+++ b/src/Parser.jl
@@ -1,6 +1,7 @@
 module Parser  # JSON
 
 using Compat
+using Compat.Mmap
 using ..Common
 
 """
diff --git a/test/lowering.jl b/test/lowering.jl
index 96d2ce6..3eaad5f 100644
--- a/test/lowering.jl
+++ b/test/lowering.jl
@@ -1,7 +1,7 @@
 module TestLowering
 
 using JSON
-using Base.Test
+using Compat.Test
 using FixedPointNumbers: Fixed
 
 if isdefined(Base, :Dates)
diff --git a/test/runtests.jl b/test/runtests.jl
index a879df7..15d6b75 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,5 +1,5 @@
 using JSON
-using Base.Test
+using Compat.Test
 using Compat
 using OffsetArrays
 
diff --git a/test/serializer.jl b/test/serializer.jl
index 9c05fb0..69da5e6 100644
--- a/test/serializer.jl
+++ b/test/serializer.jl
@@ -1,7 +1,7 @@
 module TestSerializer
 
 using JSON
-using Base.Test
+using Compat.Test
 
 # to define a new serialization behaviour, import these first
 import JSON.Serializations: CommonSerialization, StandardSerialization