diff --git a/.buildlibrary b/.buildlibrary
index 088ea62dc..f1f4899d0 100644
--- a/.buildlibrary
+++ b/.buildlibrary
@@ -1,4 +1,4 @@
-ValidationKey: '5396320'
+ValidationKey: '5415219'
 AcceptedWarnings:
 - 'Warning: package ''.*'' was built under R version'
 - 'Warning: namespace ''.*'' is not available and has been replaced'
diff --git a/.zenodo.json b/.zenodo.json
index ae6a614ff..627eecd0c 100644
--- a/.zenodo.json
+++ b/.zenodo.json
@@ -1,6 +1,6 @@
 {
   "title": "mrmagpie: madrat based MAgPIE Input Data Library",
-  "version": "0.29.0",
+  "version": "0.29.1",
   "description": "<p>Provides functions for MAgPIE country and cellular input data generation.<\/p>",
   "creators": [
     {
diff --git a/DESCRIPTION b/DESCRIPTION
index 037959dd1..cec50cf9f 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: mrmagpie
 Type: Package
 Title: madrat based MAgPIE Input Data Library
-Version: 0.29.0
-Date: 2020-12-12
+Version: 0.29.1
+Date: 2020-12-13
 Authors@R: c(person("Kristine", "Karstens", email = "karstens@pik-potsdam.de", role = c("aut","cre")),
              person("Jan Philipp", "Dietrich", email = "dietrich@pik-potsdam.de", role = "aut"),
              person("David", "Chen", role = "aut"),
diff --git a/NAMESPACE b/NAMESPACE
index 10687d663..589b2957c 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -79,6 +79,7 @@ importFrom(raster,as.matrix)
 importFrom(raster,brick)
 importFrom(raster,extent)
 importFrom(raster,extract)
+importFrom(raster,levels)
 importFrom(raster,projectRaster)
 importFrom(raster,raster)
 importFrom(raster,rasterToPoints)
diff --git a/R/readIPCCClimate.R b/R/readIPCCClimate.R
index 575737634..47f2d42da 100644
--- a/R/readIPCCClimate.R
+++ b/R/readIPCCClimate.R
@@ -9,16 +9,16 @@
 #' readSource("IPCCClimate", convert="onlycorrect")
 #' }
 #'
-#' @importFrom raster raster aggregate extract
+#' @importFrom raster raster aggregate extract levels
 
 readIPCCClimate <-  function(){
 
   raster_1d12   <- raster("CLIMATE_ZONE.rst")
   zone_names    <- as.character(levels(raster_1d12)[[1]]$Class_name)
-  raster_1d2    <- aggregate(raster_1d12, fact=6, fun=max) # to avoid gaps (since 0 is NA)
+  raster_1d2    <- raster::aggregate(raster_1d12, fact=6, fun=max) # to avoid gaps (since 0 is NA)
 
   map           <- as.data.frame(magpie_coord)
-  mag           <- clean_magpie(as.magpie(extract(raster_1d2,map), spatial=1))
+  mag           <- clean_magpie(as.magpie(raster::extract(raster_1d2,map), spatial=1))
   #map[mag==0]   <- 6
   cellNames     <- toolMappingFile(type="cell",name="CountryToCellMapping.csv",readcsv=TRUE)$celliso
   getNames(mag) <- "NA"
diff --git a/README.md b/README.md
index 177107d3b..dcfc0d99b 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # madrat based MAgPIE Input Data Library
 
-R package **mrmagpie**, version **0.29.0**
+R package **mrmagpie**, version **0.29.1**
 
   
 
@@ -38,8 +38,8 @@ In case of questions / problems please contact Kristine Karstens <karstens@pik-p
 
 To cite package **mrmagpie** in publications use:
 
-Karstens K, Dietrich J, Chen D, Windisch M, Alves M, Beier F, v. Jeetze P, Mishra A, Humpenoeder F (2020). _mrmagpie: madrat
-based MAgPIE Input Data Library_. R package version 0.29.0.
+Karstens K, Dietrich J, Chen D, Windisch M, Alves M, Beier F, v. Jeetze P, Mishra A, Humpenoeder F (2020). _mrmagpie: madrat based
+MAgPIE Input Data Library_. R package version 0.29.1.
 
 A BibTeX entry for LaTeX users is
 
@@ -48,7 +48,7 @@ A BibTeX entry for LaTeX users is
   title = {mrmagpie: madrat based MAgPIE Input Data Library},
   author = {Kristine Karstens and Jan Philipp Dietrich and David Chen and Michael Windisch and Marcos Alves and Felicitas Beier and Patrick {v. Jeetze} and Abhijeet Mishra and Florian Humpenoeder},
   year = {2020},
-  note = {R package version 0.29.0},
+  note = {R package version 0.29.1},
 }
 ```