diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index d9fced24..135b7a19 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -40,7 +40,7 @@ jobs:
       R_KEEP_PKG_SOURCE: yes
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2
 
diff --git a/.github/workflows/live-api.yml b/.github/workflows/live-api.yml
index 2daf0b07..19750021 100644
--- a/.github/workflows/live-api.yml
+++ b/.github/workflows/live-api.yml
@@ -21,7 +21,7 @@ jobs:
       R_KEEP_PKG_SOURCE: yes
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2
 
diff --git a/.github/workflows/pkgdown.yaml b/.github/workflows/pkgdown.yaml
index 82450331..19c9692b 100644
--- a/.github/workflows/pkgdown.yaml
+++ b/.github/workflows/pkgdown.yaml
@@ -22,7 +22,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2
 
diff --git a/.github/workflows/pr-commands.yaml b/.github/workflows/pr-commands.yaml
index 71f335b3..eea58c5c 100644
--- a/.github/workflows/pr-commands.yaml
+++ b/.github/workflows/pr-commands.yaml
@@ -14,7 +14,7 @@ jobs:
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/pr-fetch@v2
         with:
@@ -51,7 +51,7 @@ jobs:
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/pr-fetch@v2
         with:
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index 27d45283..960234cd 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -15,7 +15,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-r@v2
         with:
@@ -44,7 +44,7 @@ jobs:
 
       - name: Upload test results
         if: failure()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: coverage-test-failures
           path: ${{ runner.temp }}/package
diff --git a/R/bq-download.R b/R/bq-download.R
index 2a9c5213..c325729c 100644
--- a/R/bq-download.R
+++ b/R/bq-download.R
@@ -287,6 +287,21 @@ parse_postprocess <- function(df, bigint) {
     function(x) hms::parse_hms(x)
   )
 
+  # Fix for issue #624: Ensure NUMERIC/FLOAT columns remain as doubles
+  # Some BigQuery configurations may incorrectly return NUMERIC columns as INTEGER type
+  df <- col_apply(
+    df,
+    function(x) {
+      # Check if this is a NUMERIC or BIGNUMERIC column that got parsed as integer64
+      bq_type <- attr(x, "bq_type")
+      !is.null(bq_type) && bq_type %in% c("NUMERIC", "BIGNUMERIC") && bit64::is.integer64(x)
+    },
+    function(x) {
+      # Convert back to double to preserve decimal precision
+      as.numeric(x)
+    }
+  )
+
   if (bigint != "integer64") {
     as_bigint <- switch(
       bigint,
@@ -294,7 +309,10 @@ parse_postprocess <- function(df, bigint) {
       numeric = as.numeric,
       character = as.character
     )
-    df <- col_apply(df, bit64::is.integer64, as_bigint)
+    # Only apply bigint conversion to true INTEGER columns, not NUMERIC/FLOAT
+    df <- col_apply(df, function(x) {
+      bit64::is.integer64(x) && !attr(x, "bq_type") %in% c("NUMERIC", "BIGNUMERIC", "FLOAT")
+    }, as_bigint)
   }
 
   df
diff --git a/tests/testthat/test-bq-download.R b/tests/testthat/test-bq-download.R
index 68fa317b..9088cb74 100644
--- a/tests/testthat/test-bq-download.R
+++ b/tests/testthat/test-bq-download.R
@@ -396,3 +396,27 @@ test_that("can convert bytes type", {
     )
   )
 })
+
+test_that("NUMERIC columns preserve double precision (issue #624)", {
+  # Test that NUMERIC/BIGNUMERIC columns are not converted to integers
+  # even when bigint = "integer" is used
+  
+  # Create test data that simulates NUMERIC columns incorrectly parsed as integer64
+  test_data <- data.frame(
+    value = bit64::as.integer64(c(123, 456, 789)),
+    count = bit64::as.integer64(c(1, 2, 3))
+  )
+  attr(test_data$value, "bq_type") <- "NUMERIC"  # Should remain double
+  attr(test_data$count, "bq_type") <- "INTEGER"  # Should be converted to int
+  
+  # Apply post-processing with bigint = "integer"
+  result <- parse_postprocess(test_data, bigint = "integer")
+  
+  # NUMERIC column should remain as double
+  expect_type(result$value, "double")
+  expect_equal(result$value, c(123, 456, 789))
+  
+  # INTEGER column should be converted to integer
+  expect_type(result$count, "integer")
+  expect_equal(result$count, c(1L, 2L, 3L))
+})