diff --git a/docs/rtd_environment.yml b/docs/rtd_environment.yml
index f7714abcca1aa7fb1cf7020249c51bf5d285bfbc..7ac27455e001087ad9a9bc6566698bb580f18bcf 100644
--- a/docs/rtd_environment.yml
+++ b/docs/rtd_environment.yml
@@ -15,4 +15,5 @@ dependencies:
   - sphinx
   - sphinx_rtd_theme
   - mock
-  - pillow
\ No newline at end of file
+  - pillow
+  - pyfftw
\ No newline at end of file
diff --git a/environment.yml b/environment.yml
index 677da42eda9c0a794008fd0f54aaff29b24ede60..35a849092f4d844cb7c4a87813984b4e5843eccc 100644
--- a/environment.yml
+++ b/environment.yml
@@ -1,4 +1,4 @@
-name: rst
+name: pyrst
 channels:
   - conda-forge
   - defaults
@@ -9,4 +9,5 @@ dependencies:
   - gsl
   - h5py
   - numpy
-  - scipy
\ No newline at end of file
+  - scipy
+  - pyfftw
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 7bcdc2d8b5729aaedcb5f8d32bc709d7d0a7e844..23bc93304b55ce12250657d064fbb0ccc520cc0e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ CythonGSL==0.2.2
 h5py==2.10.0
 numpy==1.19.1
 scipy==1.5.2
+pyfftw==0.12.0
\ No newline at end of file