diff --git a/envs/environment.fixed.yaml b/envs/environment.fixed.yaml
index dee915b6c..3fe3d51af 100644
--- a/envs/environment.fixed.yaml
+++ b/envs/environment.fixed.yaml
@@ -1,9 +1,7 @@
-# SPDX-FileCopyrightText: : 2017-2021 The PyPSA-Eur Authors
+# SPDX-FileCopyrightText: : 2017-2020 The PyPSA-Eur Authors
 #
 # SPDX-License-Identifier: CC0-1.0
 
-
-
 name: pypsa-eur
 channels:
   - bioconda
@@ -51,7 +49,7 @@ dependencies:
   - connection_pool=0.0.3
   - country_converter=0.7.3
   - cryptography=3.4.7
-  - curl=7.78.0
+  - curl=7.79.0
   - cycler=0.10.0
   - cytoolz=0.11.0
   - dask=2021.3.1
@@ -106,7 +104,7 @@ dependencies:
   - jpeg=9d
   - json-c=0.15
   - jsonschema=3.2.0
-  - jupyter_core=4.7.1
+  - jupyter_core=4.8.1
   - kealib=1.4.14
   - kiwisolver=1.3.2
   - krb5=1.19.2
@@ -116,18 +114,18 @@ dependencies:
   - libblas=3.9.0
   - libcblas=3.9.0
   - libclang=11.1.0
-  - libcurl=7.78.0
+  - libcurl=7.79.0
   - libdap4=3.20.6
   - libedit=3.1.20191231
   - libev=4.33
   - libevent=2.1.10
-  - libffi=3.3
-  - libgcc-ng=11.1.0
+  - libffi=3.4.2
+  - libgcc-ng=11.2.0
   - libgdal=3.2.1
-  - libgfortran-ng=11.1.0
-  - libgfortran5=11.1.0
+  - libgfortran-ng=11.2.0
+  - libgfortran5=11.2.0
   - libglib=2.68.4
-  - libgomp=11.1.0
+  - libgomp=11.2.0
   - libiconv=1.16
   - libkml=1.3.0
   - liblapack=3.9.0
@@ -144,7 +142,7 @@ dependencies:
   - libspatialindex=1.9.3
   - libspatialite=5.0.1
   - libssh2=1.10.0
-  - libstdcxx-ng=11.1.0
+  - libstdcxx-ng=11.2.0
   - libtiff=4.2.0
   - libuuid=2.32.1
   - libvorbis=1.3.7
@@ -165,7 +163,7 @@ dependencies:
   - matplotlib-inline=0.1.3
   - memory_profiler=0.58.0
   - mock=4.0.3
-  - more-itertools=8.9.0
+  - more-itertools=8.10.0
   - msgpack-python=1.0.2
   - munch=2.5.0
   - mysql-common=8.0.25
@@ -271,9 +269,9 @@ dependencies:
   - toolz=0.11.1
   - toposort=1.6
   - tornado=6.1
-  - tqdm=4.62.2
+  - tqdm=4.62.3
   - traitlets=5.1.0
-  - typing_extensions=3.10.0.0
+  - typing_extensions=3.10.0.2
   - tzcode=2021a
   - tzdata=2021a
   - urllib3=1.26.6