diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 19fa7fa..5cbf621 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -1,11 +1,14 @@
 # For help debugging build failures open an issue on the RStudio community with the 'github-actions' tag.
 # https://community.rstudio.com/new-topic?category=Package%20development&tags=github-actions
-on: push
+on: 
+  push:
+  pull_request:
 name: R-CMD-check
 
 jobs:
   R-CMD-check:
     runs-on: ${{ matrix.config.os }}
+    timeout-minutes: 60
 
     name: ${{ matrix.config.os }} (${{ matrix.config.r }})
 
@@ -46,6 +49,14 @@ jobs:
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
           restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-
 
+      - name: Cache Julia installation
+        if: runner.os != 'Windows'
+        uses: actions/cache@v4
+        with:
+          path: ~/.julia
+          key: ${{ runner.os }}-julia-1.10-${{ hashFiles('**/Project.toml') }}
+          restore-keys: ${{ runner.os }}-julia-1.10-
+
       - name: Install system dependencies
         if: runner.os == 'Linux'
         run: |
diff --git a/DESCRIPTION b/DESCRIPTION
index a076b1c..fda36a2 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: diffeqr
 Type: Package
 Title: Solving Differential Equations (ODEs, SDEs, DDEs, DAEs)
-Version: 2.1.0
+Version: 2.1.1
 Authors@R: person("Christopher", "Rackauckas", email = "me@chrisrackauckas.com", role = c("aut", "cre", "cph"))
 Description: An interface to 'DifferentialEquations.jl' <https://diffeq.sciml.ai/dev/> from the R programming language.
   It has unique high performance methods for solving ordinary differential equations (ODE), stochastic differential equations (SDE),
diff --git a/NEWS.md b/NEWS.md
index ec30c28..47fa922 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+## Release v2.1.1
+
+Improved Julia installation stability and R 4.5.0 compatibility. Fixed upstream JuliaCall to install LTS (Long-Term Support) Julia versions by default instead of latest versions, providing better stability and compatibility across R versions.
+
 ## Release v2.1.0
 
 Better support for ModelingToolkit JIT tracing on SDEs.