diff --git a/.env b/.env
index b4a1809..4c0593c 100644
--- a/.env
+++ b/.env
@@ -20,4 +20,4 @@ BASE=IMS_XY-${NAME}
 ROUNDS=20
 TEST_REPEATS=1
 
-S3ARGS={"anon": true, "client_kwargs": {"endpoint_url": "http://${HOST}:9000"}}
+S3ARGS='{"anon": true, "client_kwargs": {"endpoint_url": "http://${HOST}:9000"}}'
diff --git a/benchmark/environment.yml b/benchmark/environment.yml
index 6257617..f321694 100644
--- a/benchmark/environment.yml
+++ b/benchmark/environment.yml
@@ -17,7 +17,7 @@ dependencies:
   - zarr==2.7.1
   - go-mc==2020.11.17
   - pip==21.0.1
-  - pytest-benchmark==3.4.1
+  - pytest-benchmark==4.0.0
   - pytest-csv==2.0.2
   - pytest-profiling==1.7.0
   - seaborn==0.11.1
diff --git a/convert/Dockerfile b/convert/Dockerfile
index 2eefa71..1d5d631 100644
--- a/convert/Dockerfile
+++ b/convert/Dockerfile
@@ -1,2 +1,2 @@
 FROM continuumio/miniconda3:4.10.3
-RUN conda install -c ome bioformats2raw raw2ometiff
+RUN conda install -c ome 'bioformats2raw==0.3.0' 'raw2ometiff==0.3.0'
diff --git a/generate/imarisWriter-Setup.sh b/generate/imarisWriter-Setup.sh
index 8dc4349..53fadbe 100755
--- a/generate/imarisWriter-Setup.sh
+++ b/generate/imarisWriter-Setup.sh
@@ -20,7 +20,7 @@ cp -r build/_CPack_Packages/Linux/TGZ/HDF5-1.12.0-Linux/HDF_Group/HDF5/1.12.0/in
 cd ..
 
 #zlib
-wget -N -O zlib-1.2.12.tar.gz https://www.zlib.net/zlib-1.2.12.tar.gz
+wget -N -O zlib-1.2.12.tar.gz https://www.zlib.net/fossils/zlib-1.2.12.tar.gz
 tar -xzf zlib-1.2.12.tar.gz
 cd zlib-1.2.12/
 ./configure --prefix=./zlibInstall