diff --git a/.buildlibrary b/.buildlibrary
index 7dfc8c7..1d20f87 100644
--- a/.buildlibrary
+++ b/.buildlibrary
@@ -1,4 +1,4 @@
-ValidationKey: '2097375'
+ValidationKey: '2198460'
 AutocreateReadme: no
 AcceptedWarnings:
 - 'Warning: package ''.*'' was built under R version'
diff --git a/CITATION.cff b/CITATION.cff
index c565227..9d3b989 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -2,8 +2,8 @@ cff-version: 1.2.0
 message: If you use this software, please cite it using the metadata from this file.
 type: software
 title: 'GDPuc: Easily Convert GDP Data'
-version: 1.0.5
-date-released: '2024-09-09'
+version: 1.1.0
+date-released: '2024-09-20'
 abstract: Convert GDP time series data from one unit to another. All common GDP units
   are included, i.e. current and constant local currency units, US$ via market exchange
   rates and international dollars via purchasing power parities.
diff --git a/DESCRIPTION b/DESCRIPTION
index ccdfcd7..904d26a 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: GDPuc
 Title: Easily Convert GDP Data
-Version: 1.0.5
-Date: 2024-09-09
+Version: 1.1.0
+Date: 2024-09-20
 Authors@R:
     person("Johannes", "Koch", , "jokoch@pik-potsdam.de", role = c("aut", "cre"))
 Description: Convert GDP time series data from one unit to
diff --git a/R/check_user_input.R b/R/check_user_input.R
index 5a5caba..9186dfc 100644
--- a/R/check_user_input.R
+++ b/R/check_user_input.R
@@ -47,13 +47,14 @@ check_gdp <- function(gdp) {
 # Check input parameters 'unit_in' and 'unit_out'
 check_unit_in_out <- function(unit_in, unit_out) {
   valid_units <- c(
-    "current LCU",
-    "current US\\$MER",
-    "current Int\\$PPP",
-    "constant .... LCU",
-    "constant .... US\\$MER",
-    "constant .... \u20ac",
-    "constant .... Int\\$PPP"
+    "^current LCU$",
+    "^current US\\$MER$",
+    "^current Int\\$PPP$",
+    "^constant .... LCU$",
+    "^constant .... US\\$MER$",
+    "^constant .... \u20ac$",
+    "^constant .... EUR$",
+    "^constant .... Int\\$PPP$"
   )
   if (!is.character(unit_in) || !any(sapply(valid_units, grepl, unit_in))) {
     abort("Invalid 'unit_in' argument.")
diff --git a/R/convertGDP.R b/R/convertGDP.R
index 9bb53dc..1e45edc 100644
--- a/R/convertGDP.R
+++ b/R/convertGDP.R
@@ -135,7 +135,7 @@ convertGDP <- function(gdp,
     gsub("_YYYY", "", .) %>%
     gsub("\\$", "", .) %>%
     # \u20ac is the ascii code for the € sign
-    gsub("\u20ac", "EURO", .)
+    gsub("\u20ac|EUR", "EURO", .)
 
   # Get list of function arguments
   a <- list("gdp" = internal$gdp, "source" = internal$source) %>%
diff --git a/tests/testthat/test-05_convertGDP.R b/tests/testthat/test-05_convertGDP.R
index 5d55345..73633a5 100644
--- a/tests/testthat/test-05_convertGDP.R
+++ b/tests/testthat/test-05_convertGDP.R
@@ -214,3 +214,24 @@ test_that("convertSingle", {
   expect_equal(gdp1_conv$value, gdp2_conv)
   expect_equal(gdp1_conv, gdp3_conv$result)
 })
+
+test_that("convert euros", {
+  gdp1_conv <- convertSingle(100, "USA",
+                             unit_in = "constant 2015 LCU",
+                             unit_out = "constant 2017 €")
+
+  gdp2_conv <- convertSingle(100, "USA",
+                             unit_in = "constant 2015 LCU",
+                             unit_out = "constant 2017 EUR")
+
+  gdp3_conv <- convertSingle(100, "DEU",
+                             unit_in = "constant 2010 LCU",
+                             unit_out = "constant 2017 €")
+
+  gdp4_conv <- convertSingle(100, "DEU",
+                             unit_in = "constant 2010 €",
+                             unit_out = "constant 2017 LCU")
+
+  expect_equal(gdp1_conv, gdp2_conv)
+  expect_equal(gdp3_conv, gdp4_conv)
+})