diff --git a/hgis.cabal b/hgis.cabal
--- a/hgis.cabal
+++ b/hgis.cabal
@@ -1,5 +1,5 @@
 name: hgis
-version: 0.1.3.4
+version: 0.1.3.5
 cabal-version: >=1.10
 build-type: Simple
 license: BSD3
@@ -84,7 +84,7 @@
     main-is: MainPng.hs
     build-depends:
         base >=4.9.1.0 && <4.10,
-        hgis >=0.1.3.4 && <0.2
+        hgis >=0.1.3.5 && <0.2
     default-language: Haskell2010
     hs-source-dirs: app
 
@@ -93,8 +93,8 @@
     main-is: Spec.hs
     build-depends:
         base >=4.9.1.0 && <4.10,
-        hgis >=0.1.3.4 && <0.2,
-        hspec >=2.4.2 && <2.5
+        hgis >=0.1.3.5 && <0.2,
+        hspec >=2.4.3 && <2.5
     default-language: Haskell2010
     hs-source-dirs: test
     ghc-options: -threaded -rtsopts -with-rtsopts=-N
diff --git a/src/GIS/Exe/Parser.hs b/src/GIS/Exe/Parser.hs
--- a/src/GIS/Exe/Parser.hs
+++ b/src/GIS/Exe/Parser.hs
@@ -25,7 +25,10 @@
         ( command "compute" (info computationP ( progDesc "Compute perimeter, area, etc. of map" ))
         <> command "map" (info mapMaker ( progDesc "Make a map from a shapefile database." ))
         <> command "labelmap" (info mapLabelMaker ( progDesc "Make a map from a shapefile database, and label areas with relevant info" )))
-    <*> ( argument str ( metavar "SHAPEFILE" <> help "Path to .shp file" ) )
+    <*> ( argument str 
+            (metavar "SHAPEFILE" 
+            <> help "Path to .shp file"
+            <> completer (bashCompleter "file -X '!*.shp' -o plusdirs")))
 
 -- | Parses the `Command` datatype into a Computation
 computationP :: Parser Command
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -15,7 +15,8 @@
 # resolver:
 #  name: custom-snapshot
 #  location: "./custom-snapshot.yaml"
-resolver: lts-8.5
+#resolver: lts-8.5
+resolver: lts-8.18
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.