diff --git a/R/ef_brazil_cetesb.R b/R/ef_brazil_cetesb.R
index e37c33a..73f1f7b 100644
--- a/R/ef_brazil_cetesb.R
+++ b/R/ef_brazil_cetesb.R
@@ -3,7 +3,7 @@
 #' 
 #' @description 
 #' Returns a vector or `data.table` of emission factors for buses based on 
-#' estimates from the  [Environment Company of Sao Paulo, Brazil (CETESB) 2019](https://cetesb.sp.gov.br/veicular/).
+#' estimates from the  Environment Company of Sao Paulo, Brazil (CETESB) 2019.
 #' Emission factor estimates are expressed in units 'g/km'.
 #'
 #' @param pollutant character. Pollutants "CH4", "CO2", "PM10", "N2O", "NOx",
diff --git a/man/ef_brazil_cetesb.Rd b/man/ef_brazil_cetesb.Rd
index 4cc184a..97af87a 100644
--- a/man/ef_brazil_cetesb.Rd
+++ b/man/ef_brazil_cetesb.Rd
@@ -28,7 +28,7 @@ data.table. Emission factors in units 'g/km' by model_year.
 }
 \description{
 Returns a vector or \code{data.table} of emission factors for buses based on
-estimates from the  \href{https://cetesb.sp.gov.br/veicular/}{Environment Company of Sao Paulo, Brazil (CETESB) 2019}.
+estimates from the  Environment Company of Sao Paulo, Brazil (CETESB) 2019.
 Emission factor estimates are expressed in units 'g/km'.
 }
 \details{
diff --git a/vignettes/gtfs2emis_emission_factor.Rmd b/vignettes/gtfs2emis_emission_factor.Rmd
index eede204..55e8e9d 100644
--- a/vignettes/gtfs2emis_emission_factor.Rmd
+++ b/vignettes/gtfs2emis_emission_factor.Rmd
@@ -39,7 +39,7 @@ can be found on the agencies' websites in the links below
 ***Hot-exhaust emissions***
 
 \- Brazil, Environment Company of Sao Paulo ---
-[CETESB](https://cetesb.sp.gov.br/veicular/)
+[CETESB]
 
 \- United States, Environmental Protection Agency --- [MOVES3
 Model](https://www.epa.gov/moves)