diff --git a/.travis.yml b/.travis.yml
index 8a38df6..c197d7b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,6 @@ os:
   - linux
   - osx
 julia:
-  - 0.6
-  - 0.7
   - 1.0
   - nightly
 notifications:
@@ -18,6 +16,6 @@ matrix:
     - julia: nightly
 after_success:
   # push coverage results to Coveralls
-  - julia -e 'cd(Pkg.dir("PeriodicTable")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'
+  - julia -e 'using Pkg; cd(joinpath(dirname(pathof(PeriodicTable)), "..")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'
   # push coverage results to Codecov
-  - julia -e 'cd(Pkg.dir("PeriodicTable")); Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'
+  - julia -e 'using Pkg; cd(joinpath(dirname(pathof(PeriodicTable)), "..")); Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'
diff --git a/Project.toml b/Project.toml
new file mode 100644
index 0000000..4ce744f
--- /dev/null
+++ b/Project.toml
@@ -0,0 +1,12 @@
+name = "PeriodicTable"
+uuid = "7b2266bf-644c-5ea3-82d8-af4bbd25a884"
+version = "1.0.0"
+
+[deps]
+Base64 = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
+
+[compat]
+julia = "1"
+Unitful = "1.0"
diff --git a/REQUIRE b/REQUIRE
deleted file mode 100644
index bf29947..0000000
--- a/REQUIRE
+++ /dev/null
@@ -1,3 +0,0 @@
-julia 0.6
-Compat 0.33.0
-Unitful 
\ No newline at end of file
diff --git a/src/PeriodicTable.jl b/src/PeriodicTable.jl
index 9783c45..0687709 100644
--- a/src/PeriodicTable.jl
+++ b/src/PeriodicTable.jl
@@ -11,7 +11,6 @@ e.g. `elements[:O]`.
 module PeriodicTable
 export Element, elements
 
-using Compat: replace
 import Unitful: u, g, cm, K, J, mol, Quantity
 
 """
diff --git a/test/runtests.jl b/test/runtests.jl
index 0f40219..01bbfb0 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,7 +1,7 @@
-using PeriodicTable, Compat, Unitful
+using PeriodicTable, Unitful
 import Unitful: u, g, cm, K, J, mol
-using Compat.Test
-using Compat.Base64
+using Test
+using Base64
 
 @test eltype(elements) == Element
 @test length(elements) == 119 == length(collect(elements))