diff --git a/CITATION.bib b/CITATION.bib
index bb40752..1938adc 100644
--- a/CITATION.bib
+++ b/CITATION.bib
@@ -1,8 +1,8 @@
 @Misc{orban-siqueira-nlpmodelsmodifiers-2021,
   author = {D. Orban and A. S. Siqueira and {contributors}},
   title = {{NLPModelsModifiers.jl}: Model modifiers for NLPModels},
-  month = {July},
+  month = {March},
   howpublished = {\url{https://github.com/JuliaSmoothOptimizers/NLPModelsModifiers.jl}},
-  year = {2020},
-  DOI = {---},
+  year = {2021},
+  DOI = {10.5281/zenodo.4603924},
 }
diff --git a/README.md b/README.md
index 869d5a0..09e0f1e 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ The models in this package specialize on modifying existing methods.
 
 ## How to Cite
 
-[![DOI](https://zenodo.org/badge/DOI/---.svg)](https://doi.org/---)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.4603924.svg)](https://doi.org/10.5281/zenodo.4603924)
 [![GitHub release](https://img.shields.io/github/release/JuliaSmoothOptimizers/NLPModelsModifiers.jl.svg)](https://github.com/JuliaSmoothOptimizers/NLPModelsModifiers.jl/releases/latest)
 [![](https://img.shields.io/badge/docs-stable-3f51b5.svg)](https://JuliaSmoothOptimizers.github.io/NLPModelsModifiers.jl/stable)
 [![](https://img.shields.io/badge/docs-latest-3f51b5.svg)](https://JuliaSmoothOptimizers.github.io/NLPModelsModifiers.jl/dev)