# Where to put zlib1.dll to run Julia package

**URL:** https://discourse.julialang.org/t/where-to-put-zlib1-dll-to-run-julia-package/133557
**Category:** New to Julia
**Tags:** question, package
**Created:** [October 30, 2025, 1:32pm UTC](https://discourse.julialang.org/t/where-to-put-zlib1-dll-to-run-julia-package/133557 "2025-10-30T13:32:45Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Monicate](https://avatars.discourse-cdn.com/v4/letter/m/e5b9ba/32.png) [@Monicate](https://discourse.julialang.org/u/Monicate)
#### Post date: [October 30, 2025, 1:32pm UTC](https://discourse.julialang.org/t/where-to-put-zlib1-dll-to-run-julia-package/133557/1 "2025-10-30T13:32:45Z")

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Hello, I’m trying to run a package ( [Denice\_van\_Herwerden / jhrmstoolbox.jl — Bitbucket](https://bitbucket.org/Denice_van_Herwerden/jhrmstoolbox.jl/src/main/)) and it complains about not being able to find zlib1.dll. Where do I need to put this file? I found a similar question for Linux but I use Windows and the suggested solution didn’t work. I put it in SysWOW64 as some page suggested but that didn’t solved the problem. Thanks in advance.