diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 98f1810f..7cb050da 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -32,7 +32,7 @@ jobs:
       _R_CHECK_DONTTEST_EXAMPLES_: FALSE
       _R_CHECK_CRAN_INCOMING_REMOTE_: false
       _R_CHECK_TESTS_NLINES_: 0
-      neuprint_dataset: hemibrain:v1.0.1
+      neuprint_dataset: hemibrain:v1.2.1
       neuprint_server: https://neuprint.janelia.org
       neuprint_token: ${{ secrets.NEUPRINT_TOKEN }}
       R_KEEP_PKG_SOURCE: yes
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index f96cce34..4bc44f96 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -19,7 +19,7 @@ jobs:
       _R_CHECK_DONTTEST_EXAMPLES_: FALSE
       _R_CHECK_CRAN_INCOMING_REMOTE_: false
       _R_CHECK_TESTS_NLINES_: 0
-      neuprint_dataset: hemibrain:v1.0.1
+      neuprint_dataset: hemibrain:v1.2.1
       neuprint_server: https://neuprint.janelia.org
       neuprint_token: ${{ secrets.NEUPRINT_TOKEN }}
 
diff --git a/R/conn.R b/R/conn.R
index 6f92d608..2d9b594b 100644
--- a/R/conn.R
+++ b/R/conn.R
@@ -94,7 +94,7 @@
 #'   server other than the one specified by the \code{neuprint_server}
 #'   environment variable.
 #'
-#'   \preformatted{neuprint_dataset = "hemibrain:v1.0"}
+#'   \preformatted{neuprint_dataset = "hemibrain:v1.1"}
 #'
 #' @section Options: Although setting environment variables is the recommended
 #'   approach, you can also set R startup options e.g. in your \code{.Rprofile}
diff --git a/README.Rmd b/README.Rmd
index cd52827b..665c163e 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -76,7 +76,7 @@ Make sure you have a blank line at the end of your `.Renviron` file. Note that
 you can optionally specify a default dataset:
 
 ```{r, eval=FALSE}
-neuprint_dataset = "hemibrain:v1.0"
+neuprint_dataset = "hemibrain:v1.1"
 ```
 
 if your neuPrint server has more than one dataset. For further information 
diff --git a/README.md b/README.md
index b961e0a8..bd3a8feb 100644
--- a/README.md
+++ b/README.md
@@ -109,7 +109,7 @@ Make sure you have a blank line at the end of your `.Renviron` file.
 Note that you can optionally specify a default dataset:
 
 ``` r
-neuprint_dataset = "hemibrain:v1.0"
+neuprint_dataset = "hemibrain:v1.1"
 ```
 
 if your neuPrint server has more than one dataset. For further
diff --git a/man/neuprint_login.Rd b/man/neuprint_login.Rd
index bd143472..db9b2c4e 100644
--- a/man/neuprint_login.Rd
+++ b/man/neuprint_login.Rd
@@ -125,7 +125,7 @@ After successful login, the \code{neuprint_connection} object will
   server other than the one specified by the \code{neuprint_server}
   environment variable.
 
-  \preformatted{neuprint_dataset = "hemibrain:v1.0"}
+  \preformatted{neuprint_dataset = "hemibrain:v1.1"}
 }
 
 \section{Options}{
diff --git a/tests/testthat/test-conn.R b/tests/testthat/test-conn.R
index fba436c0..98aef52f 100644
--- a/tests/testthat/test-conn.R
+++ b/tests/testthat/test-conn.R
@@ -18,7 +18,7 @@ test_that("neuprint_connection works", {
   skip_if_offline()
   expect_warning(expect_is(
     conn <- neuprint_login(server = "neuprint.janelia.org",
-                   dataset = 'hemibrain:v1.0.1',
+                   dataset = 'hemibrain:v1.2.1',
                    Cache = F, Force = T),
     "neuprint_connection"
   ),
diff --git a/tests/testthat/test-connectivity.R b/tests/testthat/test-connectivity.R
index 87150982..1e08c64c 100644
--- a/tests/testthat/test-connectivity.R
+++ b/tests/testthat/test-connectivity.R
@@ -142,7 +142,7 @@ test_that("other connectivity functions work", {
   # check that results for one neuron are consistent with the same
   # neuron as part of a larger query
   c11.sel=c11[names(c1)]
-  c11.sel=c11.sel[!is.na(c11.sel$`2002436731_weight`),,drop=FALSE]
+  c11.sel=c11.sel[!is.na(c11.sel$`1734350788_weight`),,drop=FALSE]
   c11.sel=c11.sel[order(c11.sel$input),,drop=FALSE]
   c1=c1[order(c1$input),,drop=FALSE]
   expect_equal(c1, c11.sel)
diff --git a/tests/testthat/test-cosine.R b/tests/testthat/test-cosine.R
index 73befa2c..98646aca 100644
--- a/tests/testthat/test-cosine.R
+++ b/tests/testthat/test-cosine.R
@@ -3,11 +3,11 @@ test_that("neuprint_cosine_matrix works", {
   skip_if(as.logical(Sys.getenv("SKIP_NP_SERVER_TESTS")))
   expect_known_hash(
     cm <- neuprint_cosine_matrix("/DA[1-3].*PN", grepl("ORN",type), partners='in'),
-    hash='f69bb3c63d')
+    hash='8e4e615aa3')
   expect_known_hash(
     cm2 <- neuprint_cosine_matrix("/DA[1-3].*PN", grepl("ORN",type), partners='in',
                                   group='type', details='type'),
-    '8ea9ca29f1')
+    '86cee222fe')
 
   expect_silent(neuprint_cosine_plot(cm))
   expect_silent(
diff --git a/tests/testthat/testdata/hemibrain_neuprint_ROI_hierarchy.rds b/tests/testthat/testdata/hemibrain_neuprint_ROI_hierarchy.rds
index f9ffa0a9..5e251cd5 100644
Binary files a/tests/testthat/testdata/hemibrain_neuprint_ROI_hierarchy.rds and b/tests/testthat/testdata/hemibrain_neuprint_ROI_hierarchy.rds differ
diff --git a/vignettes/hemibrain_opns.Rmd b/vignettes/hemibrain_opns.Rmd
index 7585b06d..6ee8dc0f 100644
--- a/vignettes/hemibrain_opns.Rmd
+++ b/vignettes/hemibrain_opns.Rmd
@@ -69,7 +69,7 @@ The main point is that you can then edit your R.environ file to contain informat
 
 `neuprint_token="YOUR_TOKEN_HERE"`
 `neuprint_server='https://neuprint.janelia.org/'`
-`neuprint_dataset='hemibrain:v1.0'`
+`neuprint_dataset='hemibrain:v1.1'`
 
 Leave a blank line at the end of the file.