diff --git a/.github/workflows/rworkflows.yml b/.github/workflows/rworkflows.yml
index 891b236..a905549 100644
--- a/.github/workflows/rworkflows.yml
+++ b/.github/workflows/rworkflows.yml
@@ -28,12 +28,12 @@ jobs:
           cont: ghcr.io/bioconductor/bioconductor_docker:devel
           rspm: ~
         - os: macOS-latest
-          bioc: release
+          bioc: devel
           r: auto
           cont: ~
           rspm: ~
         - os: windows-latest
-          bioc: release
+          bioc: devel
           r: auto
           cont: ~
           rspm: ~
diff --git a/DESCRIPTION b/DESCRIPTION
index 2a3ba1c..b1d801c 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -24,6 +24,7 @@ biocViews:
 Depends:
     R (>= 4.3.0)
 Imports:
+    SummarizedExperiment,
     SpatialExperiment,
     tidySpatialExperiment,
     tidySummarizedExperiment,
diff --git a/vignettes/Session_1_sequencing_assays.Rmd b/vignettes/Session_1_sequencing_assays.Rmd
index 9fd02df..00025e5 100644
--- a/vignettes/Session_1_sequencing_assays.Rmd
+++ b/vignettes/Session_1_sequencing_assays.Rmd
@@ -195,9 +195,10 @@ Maynard and Torres et al., doi: [10.1038/s41593-020-00787-0](https://www.ncbi.nl
 library(spatialLIBD)
 library(ExperimentHub)
 
-# To avoid error for SPE loading 
-# https://support.bioconductor.org/p/9161859/#9161863
-setClassUnion("ExpData", c("matrix", "SpatialExperiment"))
+# # To avoid error for SPE loading
+# # https://support.bioconductor.org/p/9161859/#9161863
+# library(methods)
+# setClassUnion("ExpData", c("matrix", "SummarizedExperiment"))
 
 spatial_data <- 
   ExperimentHub::ExperimentHub() |> 
diff --git a/vignettes/Session_2_Tidy_spatial_analyses.Rmd b/vignettes/Session_2_Tidy_spatial_analyses.Rmd
index 533120e..cba4229 100644
--- a/vignettes/Session_2_Tidy_spatial_analyses.Rmd
+++ b/vignettes/Session_2_Tidy_spatial_analyses.Rmd
@@ -57,25 +57,6 @@ style="width:100%; height:600px;"
 frameborder="0">
 </iframe>
 
-### Installation
-
-let's make sure we get the latest packages available on github
-
-```{r, eval=FALSE}
-
-# In May 2025, the following packages should be installed from github repositories, to use the latest features. In case you have them pre installed, run the following command
-BiocManager::install(c("lmweber/ggspavis", 
-                       "stemangiola/tidySummarizedExperiment", 
-                        "stemangiola/tidySingleCellExperiment", 
-                       "william-hutchison/tidySpatialExperiment", 
-                       "stemangiola/tidybulk", 
-                       "stemangiola/tidygate"), 
-                     update = FALSE)
-
-```
-
-**Important:** Please restart your R session after installation to ensure the updated packages are loaded correctly.
-
 Let's load the libraries needed for this session
 
 ```{r, message = FALSE}
@@ -112,9 +93,10 @@ doi: [10.1038/s41593-020-00787-0](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8
 library(spatialLIBD)
 library(ExperimentHub)
 
-# To avoid error for SPE loading 
-# https://support.bioconductor.org/p/9161859/#9161863
-setClassUnion("ExpData", c("matrix", "SummarizedExperiment"))
+# # To avoid error for SPE loading 
+# # https://support.bioconductor.org/p/9161859/#9161863
+# library(methods)
+# setClassUnion("ExpData", c("matrix", "SummarizedExperiment"))
 
 spatial_data <- 
   ExperimentHub::ExperimentHub() |> 
diff --git a/vignettes/Session_3_imaging_assays.Rmd b/vignettes/Session_3_imaging_assays.Rmd
index f6c5819..33f6989 100644
--- a/vignettes/Session_3_imaging_assays.Rmd
+++ b/vignettes/Session_3_imaging_assays.Rmd
@@ -98,9 +98,10 @@ tx_small =  tx[sample(seq_len(nrow(tx)), size = nrow(tx)/500),]
 ```
 
 ```{r, echo=FALSE}
-# To avoid error for SPE loading 
-# https://support.bioconductor.org/p/9161859/#9161863
-setClassUnion("ExpData", c("matrix", "SummarizedExperiment"))
+# # To avoid error for SPE loading 
+# # https://support.bioconductor.org/p/9161859/#9161863
+# library(methods)
+# setClassUnion("ExpData", c("matrix", "SummarizedExperiment"))
 
 options(timeout = max(300, getOption("timeout")))
 tx_small_file = tempfile()