diff --git a/.travis.yml b/.travis.yml
index 1ebc36e..e7702ac 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,4 +20,4 @@ after_success:
   - julia -e 'import Pkg; cd(Pkg.dir("EarthOrientation")); Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'
   # push coverage results to Coveralls
   - julia -e 'import Pkg; cd(Pkg.dir("EarthOrientation")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'
-  - julia -e 'import Pkg; Pkg.add("Documenter"); cd(Pkg.dir("EarthOrientation")); include(joinpath("docs", "make.jl"))'
+  - julia -e 'import Pkg; ps=Pkg.PackageSpec(name="Documenter", version="0.19"); Pkg.add(ps); Pkg.pin(ps); cd(Pkg.dir("EarthOrientation")); include(joinpath("docs", "make.jl"))'