diff --git a/lib/cli.luau b/lib/cli.luau
index bbc0527..3eaeec5 100644
--- a/lib/cli.luau
+++ b/lib/cli.luau
@@ -5,8 +5,8 @@ local fs = require("@lune/fs")
 local types = require("./types")
 
 export type CLI = {
-    parseArgs: () -> types.opts,
-    printUsage: () -> (),
+    parseArgs:       () -> types.opts,
+    printUsage:      () -> (),
     checkOutputFile: (outputFile: string?) -> ()
 }
 
@@ -14,8 +14,8 @@ local cli = {} :: CLI
 
 -- parses command line arguments into options
 function cli.parseArgs(): types.opts    
-    local args = process.args
-    local opts = {
+    local args: {string} = process.args
+    local opts: types.opts = {
         outputFile = nil,
         directoryMode = false,
         directoryPath = nil,
diff --git a/lib/compression.luau b/lib/compression.luau
index 98737aa..cecb964 100644
--- a/lib/compression.luau
+++ b/lib/compression.luau
@@ -14,7 +14,7 @@ function compressionModule.zlibDecompress(contents: string, recursive: boolean?)
     assert(typeof(contents) == "string", "Expected contents to be of type 'string'")
     if recursive == nil then recursive = false end
     assert(typeof(recursive) == "boolean", "Expected recursive to be of type 'boolean'")
-    local success, decompressed = pcall(function() return serde.decompress("zlib", contents) end)
+    local success, decompressed: string = pcall(function() return serde.decompress("zlib", contents) end)
     if not success then
         return false
     end